Fleece Vs Thermal: Which One Should You Choose?

Fleece and thermal fabrics are two popular choices for individuals seeking insulation and warmth in their clothing. Fleece, typically made from synthetic materials, offers a soft and fuzzy texture, excellent insulation properties, and moisture-wicking capabilities.

Thermal fabrics, on the other hand, can be composed of natural fibers like cotton or wool, or synthetic materials designed to provide thermal insulation.

They are specifically engineered to regulate body temperature, provide insulation, and manage moisture.

While fleece and thermal fabrics share some similarities, they also have distinct differences in terms of fabric composition, texture, insulation, moisture management, and suitability for various activities and weather conditions.

Key Differences Between Fleece and Thermal

Fabric Composition

• Fleece: Fleece is typically made from synthetic materials like polyester or a blend of polyester and other fibers. It is known for its soft and fuzzy texture, created by the process of brushing the fabric. The synthetic composition of fleece makes it durable, lightweight, and easy to care for.
• Thermal: Thermal fabrics can be made from a variety of materials, including natural fibers like cotton or wool, or synthetic materials designed to mimic their insulating properties. These fabrics are specifically designed to provide thermal insulation, often through the use of special weaves or coatings that trap heat and create a barrier against cold temperatures.

Texture

• Fleece: Fleece fabric is known for its soft and fuzzy texture. This texture is achieved through a process called brushing, where the fabric is mechanically treated to raise the fibers. The resulting surface feels plush and cozy against the skin, providing a comfortable and comforting sensation.
• Thermal: The texture of thermal fabrics can vary depending on the specific fabric composition. Natural fiber thermal fabrics like cotton and wool may have a smoother texture compared to fleece. Cotton thermal fabrics tend to be soft and smooth, while wool thermal fabrics can have a slightly coarse texture. Synthetic thermal fabrics often aim to mimic the texture of natural fibers, but they may have a smoother or more textured feel depending on the specific fabric type.

Insulation

• Fleece: Fleece is highly regarded for its insulation properties. The texture of fleece, with its raised fibers, creates air pockets that trap heat close to the body, providing effective insulation. These air pockets help retain body heat, keeping you warm in cold conditions. Fleece is known for its excellent warmth-to-weight ratio, offering significant insulation while remaining relatively lightweight.
• Thermal: Thermal fabrics are specifically designed to provide insulation and retain body heat. The level of insulation offered by thermal fabrics can vary depending on the specific fabric composition. Natural fiber thermal fabrics like wool are renowned for their exceptional insulation capabilities. Wool has natural crimped fibers that create air pockets, enhancing its ability to trap warmth. Cotton thermal fabrics also provide insulation, but to a lesser extent compared to wool.

Thickness

• Fleece: Fleece fabrics are generally thicker compared to thermal fabrics. The thickness of fleece contributes to its insulation capabilities by providing more material to create air pockets and trap warmth. The exact thickness of fleece can vary depending on the specific type and intended use, ranging from lightweight microfleece to heavier, more substantial options.
• Thermal: The thickness of thermal fabrics can vary depending on the specific fabric type and intended purpose. Natural fiber thermal fabrics like cotton and wool can have varying thicknesses, offering options for different levels of insulation. Thicker thermal fabrics provide more substantial insulation, while thinner ones are suitable for layering or milder temperatures. Synthetic thermal fabrics can also come in different thicknesses, depending on the desired insulation level and intended use.

Weight

• Fleece: One of the advantages of fleece is its relatively lightweight nature. Despite its thickness, fleece is lightweight compared to other fabrics with similar insulation capabilities. This makes it comfortable to wear and allows for ease of movement during various activities.
• Thermal: The weight of thermal fabrics can vary depending on the specific fabric composition and thickness. Natural fiber thermal fabrics like cotton and wool can have different weights, with wool being generally heavier compared to cotton. Synthetic thermal fabrics also come in different weights, depending on the specific materials used. The weight of thermal fabrics influences their overall insulation properties and how suitable they are for different temperature ranges.

Moisture Management

• Fleece: Fleece fabrics often have good moisture-wicking properties. The synthetic composition of fleece allows moisture to be pulled away from the skin and dispersed across the fabric’s surface, promoting evaporation and keeping you dry during physical activities or in humid conditions.
• Thermal: Moisture management in thermal fabrics can vary depending on the specific fabric composition. Natural fiber thermal fabrics like cotton and wool have moderate moisture-wicking properties, allowing them to absorb and release moisture. However, they may not wick moisture away from the body as effectively as synthetic materials. Synthetic thermal fabrics, on the other hand, can offer enhanced moisture-wicking capabilities, pulling moisture away from the skin and promoting quick evaporation.

Breathability

• Fleece: While fleece provides good insulation, it may not be as breathable as some other fabrics. The dense structure of fleece, designed to trap warmth, can limit airflow, reducing breathability. This can result in a buildup of heat and moisture when engaged in high-intensity activities.
• Thermal: Breathability in thermal fabrics can vary depending on the specific fabric composition. Natural fiber thermal fabrics like cotton and wool tend to be more breathable compared to fleece. They allow air to circulate, aiding in moisture evaporation and enhancing comfort. Synthetic thermal fabrics can also offer varying degrees of breathability, depending on the specific materials used and the fabric’s construction.

Durability

• Fleece: Fleece fabrics are known for their durability. The synthetic composition of fleece, particularly polyester, lends itself to being strong and resistant to wear and tear. Fleece garments can withstand regular use, washing, and outdoor activities without losing their shape or becoming damaged easily.
• Thermal: The durability of thermal fabrics depends on the specific fabric type and its construction. Natural fiber thermal fabrics like cotton and wool are generally durable and can withstand regular use. Cotton thermal fabrics may be prone to pilling with frequent washing, while wool thermal fabrics are known for their resilience. Synthetic thermal fabrics are often designed to be durable, withstanding the rigors of outdoor activities and maintaining their performance over time.

Stretch

• Fleece: Fleece fabrics often have some degree of stretch, allowing for ease of movement and a comfortable fit. This stretchiness is achieved through the fabric’s knit construction or the inclusion of spandex or elastane fibers.
• Thermal: The stretch of thermal fabrics can vary depending on the specific fabric composition. Natural fiber thermal fabrics like cotton and wool may have limited stretch, providing a more structured fit. Synthetic thermal fabrics can incorporate stretch fibers to enhance flexibility and ease of movement.

Softness

• Fleece: Fleece fabrics are renowned for their softness. The brushing process used in the fabrication of fleece creates a plush, cozy texture that feels gentle against the skin. Fleece garments provide a luxurious and comfortable wearing experience.
• Thermal: The softness of thermal fabrics can vary depending on the specific fabric composition. Natural fiber thermal fabrics like cotton and wool can offer a soft and smooth feel, although they may not be as plush as fleece. Synthetic thermal fabrics aim to replicate the softness of natural fibers while providing additional benefits such as moisture-wicking or stretch.

Odor Resistance

• Fleece: Fleece fabrics may not have strong inherent odor resistance. The synthetic composition of fleece can make it more prone to retaining odors compared to natural fibers. However, many modern fleece fabrics are treated with antimicrobial finishes or technologies that help reduce odor buildup.
• Thermal: The odor resistance of thermal fabrics can vary depending on the specific fabric composition. Natural fiber thermal fabrics like cotton and wool often have inherent antimicrobial properties that naturally resist odors. Wool, in particular, is known for its ability to minimize odors due to its moisture-wicking and natural antimicrobial properties. Synthetic thermal fabrics can also incorporate antimicrobial treatments to enhance odor resistance.

Versatility

• Fleece: Fleece fabrics are highly versatile and widely used in various garments. They are commonly found in jackets, sweaters, blankets, and accessories like hats and gloves. Fleece can be suitable for both outdoor activities and casual wear due to its warmth, softness, and comfort.
• Thermal: Thermal fabrics, including thermal leggings, are often designed with specific purposes in mind. They are commonly used as base layers for activities in colder temperatures. However, thermal fabrics can also be versatile, depending on their specific composition. For example, lightweight and breathable thermal fabrics may be suitable for layering in milder conditions or for activities that require moisture management.

Quick Drying

• Fleece: Fleece fabrics can vary in their drying speed. While they are generally moisture-wicking and can help pull moisture away from the skin, the thickness and density of the fabric can impact drying time. Thicker and heavier fleece fabrics may take longer to dry compared to lighter and thinner options.
• Thermal: The quick-drying properties of thermal fabrics depend on the specific fabric type and construction. Natural fiber thermal fabrics like cotton and wool may not dry as quickly as synthetic thermal fabrics, as they have higher water absorption. Synthetic thermal fabrics, designed for moisture management, often have quick-drying capabilities, allowing them to efficiently wick away moisture and dry rapidly.

Bulkiness

• Fleece: Fleece fabrics can have a bulkier feel due to their thickness and insulating properties. The nature of fleece, which is designed to create air pockets for warmth, can result in a slightly bulkier appearance and feel compared to other fabrics. However, the exact bulkiness can vary depending on the specific fleece type, with some lighter-weight options offering a less bulky profile.
• Thermal: The bulkiness of thermal fabrics can vary depending on the specific fabric type and thickness. Natural fiber thermal fabrics like cotton and wool can range from thin and lightweight options to thicker and more substantial ones. Synthetic thermal fabrics can also vary in bulkiness, with some offering lightweight and low-profile options, while others provide more insulation and thickness.

Cost

• Fleece: Fleece fabrics are generally affordable compared to other types of materials used for insulation and warmth. The synthetic composition of fleece, particularly polyester, allows for cost-effective production, making fleece garments accessible to a wide range of budgets.
• Thermal: The cost of thermal fabrics can vary depending on factors such as the specific fabric type, brand, and additional features or technologies incorporated into the fabric. Natural fiber thermal fabrics like cotton and wool can vary in price depending on their quality and origin. Synthetic thermal fabrics can also have a range of prices depending on their performance characteristics and brand reputation.

Moisture Wicking

• Fleece: Fleece fabrics often have good moisture-wicking properties. The synthetic composition of fleece allows it to draw moisture away from the skin and disperse it across the fabric’s surface, promoting evaporation and keeping you dry during physical activities or in humid conditions.
• Thermal: Moisture management in thermal fabrics can vary depending on the specific fabric composition. Natural fiber thermal fabrics like cotton and wool have moderate moisture-wicking properties, allowing them to absorb and release moisture. However, they may not wick moisture away from the body as effectively as synthetic materials. Synthetic thermal fabrics are often designed with moisture-wicking capabilities, pulling moisture away from the skin and promoting quick evaporation.

Temperature Regulation

• Fleece: Fleece fabrics provide good insulation, helping to regulate body temperature in cooler conditions. The air pockets created by the raised fibers trap warmth, keeping you comfortable and warm in cold weather. Fleece is often used as an outer layer to provide insulation and retain body heat.
• Thermal: Thermal fabrics are specifically designed for temperature regulation. Natural fiber thermal fabrics like cotton and wool offer insulation properties that help regulate body temperature by trapping warmth. They provide comfort in colder conditions and can also wick away moisture to keep you dry. Synthetic thermal fabrics can be engineered to provide temperature regulation properties by balancing insulation and moisture-wicking capabilities.

Comfort

• Fleece: Fleece fabrics are highly regarded for their comfort. The soft and fuzzy texture of fleece, along with its lightweight nature, makes it comfortable to wear against the skin. Fleece garments provide a cozy and luxurious feel, contributing to overall comfort during outdoor activities or leisure wear.
• Thermal: The comfort of thermal fabrics can vary depending on the specific fabric composition. Natural fiber thermal fabrics like cotton and wool can offer a soft and smooth feel against the skin. They are often chosen for their natural breathability and softness. Synthetic thermal fabrics can be engineered to provide a balance of comfort and performance, incorporating features like stretch or moisture-wicking properties.

Shrinkage

• Fleece: Fleece fabrics, especially those made from polyester, tend to have minimal shrinkage. The synthetic composition of fleece allows it to retain its shape and size even after washing. However, it’s still essential to follow proper care instructions to maintain the integrity of the fabric.
• Thermal: The shrinkage of thermal fabrics can vary depending on the specific fabric type and its blend. Natural fiber thermal fabrics like cotton and wool may experience some shrinkage if not properly cared for, especially when exposed to heat and agitation during washing. Following proper care instructions, such as cold water washes and gentle drying, can help minimize shrinkage.

Environmental Impact

• Fleece: The environmental impact of fleece fabrics can be a subject of debate. Fleece is predominantly made from synthetic materials like polyester, which is derived from non-renewable resources. The production of synthetic fibers involves energy-intensive processes and the use of chemicals. However, some fleece fabrics are now made from recycled polyester, reducing the reliance on new raw materials and minimizing waste.
• Thermal: The environmental impact of thermal fabrics depends on the specific fabric composition. Natural fiber thermal fabrics like cotton and wool are derived from renewable resources and are biodegradable. However, their production may involve intensive agricultural practices or chemical treatments. Synthetic thermal fabrics, while offering performance benefits, are derived from non-renewable resources and may contribute to microplastic pollution if not properly managed.

Ease of Care

• Fleece: Fleece fabrics are generally easy to care for. They are machine washable and often quick-drying, making them convenient for regular use. Fleece garments typically do not require ironing and can be resistant to wrinkles. However, it’s important to follow the specific care instructions provided by the manufacturer to maintain the fabric’s performance and longevity.
• Thermal: The ease of care for thermal fabrics can vary depending on the specific fabric composition. Natural fiber thermal fabrics like cotton and wool may require more delicate care, including gentle washing and possibly air drying to prevent shrinking or damage. Synthetic thermal fabrics often offer easy care, being machine washable and quick-drying. However, it is still important to check the care instructions to ensure proper maintenance.

Wind Resistance

• Fleece: Fleece fabrics offer some degree of wind resistance due to their dense structure and ability to create air pockets. While fleece is not completely windproof, it can provide a certain level of protection against light to moderate winds. Thicker fleece fabrics may offer better wind resistance compared to lighter-weight options.
• Thermal: The wind resistance of thermal fabrics can vary depending on the specific fabric type and construction. Natural fiber thermal fabrics like cotton and wool may provide limited wind resistance due to their breathable nature. Synthetic thermal fabrics, especially those with wind-resistant coatings or laminations, can offer enhanced wind protection. For activities in windy conditions, additional windproof outer layers may be necessary.

Water Resistance

• Fleece: Fleece fabrics are generally not water-resistant or waterproof. They can absorb moisture and may become heavy and saturated when exposed to rain or wet conditions. However, some fleece garments may have a water-repellent treatment or coating, which can provide limited water resistance and help shed light moisture.
• Thermal: The water resistance of thermal fabrics can vary depending on the specific fabric type and treatment. Natural fiber thermal fabrics like cotton and wool are not inherently water-resistant but can retain some water repellency when not fully saturated. Synthetic thermal fabrics may offer water-resistant properties, such as hydrophobic coatings or laminations, to repel light rain or moisture.

Layering

• Fleece: Fleece fabrics are commonly used as outer layers or mid-layers in layering systems. Their warmth, lightweight nature, and breathability make them suitable for layering over base layers and under outer shells. Fleece garments can provide insulation and moisture management while allowing for ease of movement.
• Thermal: Thermal fabrics, including thermal leggings, are often used as base layers in layering systems. They provide a foundational layer of insulation and moisture management, effectively wicking away moisture from the skin. Thermal base layers can be combined with additional layers, such as fleece or outer shells, depending on the temperature and activity level.

Activity Suitability

• Fleece: Fleece fabrics are versatile and suitable for a wide range of outdoor activities and casual wear. They provide warmth, comfort, and breathability, making them suitable for activities like hiking, camping, skiing, or simply everyday use during colder weather. Fleece garments can adapt to different activity levels and temperature ranges.
• Thermal: Thermal fabrics, particularly thermal leggings, are well-suited for activities in colder temperatures. They provide insulation, moisture management, and often a comfortable fit. Thermal base layers are commonly used for winter sports, cold-weather hiking, and other outdoor activities where maintaining body temperature and managing moisture are essential.

Extreme Cold

• Fleece: Fleece fabrics may not be the ideal choice for extreme cold temperatures. While they offer insulation, their effectiveness may diminish in extremely low temperatures. Fleece garments alone may not provide sufficient warmth and protection in severe cold conditions, requiring additional layers or outer shells for insulation and wind resistance.
• Thermal: Thermal fabrics, including thermal leggings, are a better choice for activities in extremely cold temperatures. They provide insulation and help retain body heat, making them suitable for extreme cold conditions. Thermal base layers, when combined with proper layering and outer shells, can offer effective protection and warmth in harsh winter environments.

Fleece Vs Thermal: Comparison Table

Feature	Fleece	Thermal
Fabric Composition	Polyester or blend	Cotton, wool, or synthetic materials
Texture	Soft and fuzzy	Varies depending on fabric type
Insulation	Excellent warmth-to-weight ratio	Varies depending on fabric composition
Thickness	Generally thicker	Varies depending on fabric type
Weight	Relatively lightweight	Varies depending on fabric type
Moisture Management	Good moisture-wicking properties	Varies depending on fabric composition
Breathability	Generally breathable	Varies depending on fabric composition
Durability	Durable and long-lasting	Varies depending on fabric type
Stretch	Often has some stretch	Varies depending on fabric type
Softness	Very soft and cozy	Varies depending on fabric type
Odor Resistance	May retain odors	Varies depending on fabric type
Versatility	Widely used in various garments	Often used as a base layer
Quick Drying	Quick-drying properties	Varies depending on fabric composition
Bulkiness	Can be bulkier	Varies depending on fabric type
Cost	Generally affordable	Varies depending on fabric type
Moisture Wicking	Yes	Varies depending on fabric composition
Temperature Regulation	Good insulation	Varies depending on fabric composition
Comfort	Very comfortable	Varies depending on fabric type
Shrinkage	Minimal shrinkage	Varies depending on fabric type
Environmental Impact	Synthetic materials	Natural or synthetic materials
Ease of Care	Easy to care for	Varies depending on fabric composition
Wind Resistance	Offers some wind resistance	Varies depending on fabric type
Water Resistance	Can repel water to some extent	Varies depending on fabric type
Layering	Often used as an outer layer	Often used as a base layer
Activity Suitability	Suitable for various outdoor activities	Suitable for cold weather activities
Extreme Cold	May not be suitable for extreme cold	Provides better insulation in extreme cold

Frequently Asked Questions

To Recap

Fleece and thermal fabrics both serve the purpose of providing insulation and warmth, but they have their own unique characteristics. Fleece offers a soft texture, good moisture-wicking properties, and versatility for various outdoor activities.

Thermal fabrics, including natural fibers and synthetic options, prioritize temperature regulation, moisture management, and comfort.

Understanding the differences between fleece and thermal fabrics allows individuals to make informed choices based on their specific needs and the conditions they will encounter.

Whether it’s a cozy fleece jacket or thermal leggings for extreme cold, these fabrics offer reliable options for staying comfortable and protected in a range of outdoor environments.