Base Layers & Thermals

Base layers & thermals are essential for staying comfortable when the temperatures drop. Whether you’re heading out for a brisk morning hike, gearing up for a winter adventure, or just looking to add extra warmth to your everyday routine, these pieces provide reliable comfort and versatility. Crafted with quality materials and designed for lasting value, our collection of base layers & thermals makes it easy to enjoy the great outdoors all season long. Layer up and embrace every chilly day with ease and confidence.

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Men's Two-Layer Union Suit

A supersoft, charcoal union suit with a wool blend for warmth and a roomy fit for comfort.

Pros: Functional Fits well Well-made Warmth Comfortable
Men's Cresta Wool Midweight 250 Crew Top

A midweight merino wool crew top in carbon navy that wicks sweat, resists odor, and keeps you warm.

Pros: Perfect fit Soft and comfortable Durable fabric Available in big and tall sizes Great warmth
Men's Cresta Midweight 250 Pants

A versatile base layer made of 100% merino wool that wicks sweat, resists odor, and keeps you warm.

Pros: Soft material Odor resistant Versatile use Great warmth Comfortable fit
Women's Cresta Midweight 250 Pants, High-Rise Slim-Leg

A high-rise, slim-leg base layer made of 100% merino wool, perfect for versatile warmth and comfort.

Pros: Great fit High-quality fabric Non-itchy material Comfortable to wear Excellent warmth
Men's Cresta Midweight 250 Quarter-Zip Top

A dark black merino wool quarter-zip top that wicks sweat, resists odor, and keeps you warm.

Pros: Keeps you warm Excellent base layer Comfort Durability Versatility
Women's Cresta Midweight 250 Crew Top

A dark black, form-fitting merino wool crew top that wicks sweat, resists odor, and keeps you warm.

Pros: Great fit Breathable fabric High quality Perfect base layer Excellent warmth
Women's Cresta Midweight 250 T-Zip Top

A dark black, merino wool base layer that wicks sweat, resists odor, and features thumbhole cuffs.

Pros: Well-made Warmth True to size Versatile Comfortable
Men's Cresta Ultralight 150 Crew Top

A remarkably soft and warm alloy gray base layer made from 100% merino wool with thumbhole cuffs.

Pros: Soft material Warmth Good fit Comfortable Well made
Women's Cresta Ultralight 150 Crew Top

An alloy gray, form-fitting base layer made of 100% merino wool, perfect for any season.

Pros: Not itchy Lightweight Versatile Comfortable Warm
Men's Cresta Wool Ultralight 150 Pants

An ultralight base layer made from 100% merino wool, offering warmth, moisture-wicking, and odor resistance.

Pros: Lightweight Warm without being bulky Stylish Durable Comfortable
Women's L.L.Bean Simple Soft Base Layer, Crew

A lightweight, moisture-wicking black synthetic base layer with thumbholes, perfect for everyday warmth and comfort.

Pros: Great fit Smooth fabric Softness Dino style Material
Women's L.L.Bean Simple Soft Base Layer, Pants

A lightweight, moisture-wicking synthetic base layer pant in dark black, perfect for everyday warmth and layering.

Pros: Adds extra warmth Lightweight Very soft Good fit Comfortable
Women's Cresta Wool Ultralight 150 Base Layer, Hoodie
Price was from: $99.95 now: $84.99

An ultralight, alloy gray Merino wool hoodie that wicks moisture, resists odors, and fits comfortably under helmets.

Pros: High-quality material Easy to care for Perfect under layer Lightweight design Comfortable fit
Men's Cresta Wool Ultralight 150 Base Layer, Hoodie

An alloy gray, 100% Merino wool hoodie that wicks moisture, resists odors, and fits comfortably under helmets.

Pros: Soft and fleecy interior Ideal for winter sports Warm and comfortable Good fit Fashionable and supportive
Men's L.L.Bean Simple Soft Base Layer, Pants

A lightweight, moisture-wicking base layer in faded sage heather, made from 94% polyester and 6% spandex.

Pros: Great for layering Provides warmth Lightweight feel
Women's Cresta Ultralight 150 Crew Top, Stripe
Price was from: $89.95 now: $75.99

An itch-free 100% merino wool base layer top, perfect for cold-weather sports and everyday comfort.

Pros: Provides excellent warmth Soft merino wool material Great as long underwear
Men's Cresta Wool Ultralight 150 Turtleneck
Price was from: $99.95 now: $84.99

An alloy gray, 100% merino wool turtleneck that wicks moisture, resists odors, and features thumbhole cuffs.
Men's Cresta Ultralight 150 Turtleneck, Stripe
Price was from: $99.95 now: $84.99

A lightweight, itch-free 100% merino wool turtleneck in regatta blue, perfect as a base layer for winter sports.
Men's L.L.Bean Heavyweight Base Layer Crew Top

A heavyweight base layer crew top in midnight black, made from recycled polyester with moisture-wicking properties.
Men's L.L.Bean Heavyweight Base Layer Hoodie, Print

A heavyweight base layer hoodie in kelp green camo, made from recycled polyester and elastane.
Men's L.L.Bean Simple Soft Base Layer, Crew

A lightweight, moisture-wicking synthetic base layer crewneck in faded sage heather with thumbholes for secure sleeves.
Women's Silk Pointelle, Pants

A virtually weightless pair of cream silk pants with a feminine pointelle-knit and elasticized waist.

Pros: Comfort Light weight Warmth Softness Good fit
Kids' Wicked Warm Long Underwear, Expedition-Weight Pants

A moisture-wicking, quick-drying base layer with brushed fleece lining and four-way stretch for winter sports.

Pros: No annoying seams True to size Cozy Warm Super soft
Kids' Wicked Warm Long Underwear, Expedition-Weight Top

A pink, expedition-weight synthetic base layer top with lightweight fleece lining and four-way stretch for kids.

Base Layers & Thermals

Base layers and thermals are the pieces that help make a thoughtful outfit feel complete when the air turns crisp and outdoor plans stretch a little longer. Worn beneath shirts, sweaters, fleeces or jackets, they add a comfortable layer without requiring a complete change of clothes when the temperature shifts. They can be useful for a quiet morning walk, a day spent raking leaves, a weekend around the fire, a trip to a chilly rink or a long drive through changing weather. The best choice depends on how you plan to wear it, how much room you prefer beneath your outer layers and how you like a fabric to feel against your skin. Some people reach first for a close-fitting style that stays neatly in place beneath other clothing, while others prefer a little more ease for relaxing at home or wearing a thermal top on its own. Consider the shape of the neckline, the length of the sleeves and hem, and whether the garment will sit comfortably beneath the layers already in your closet. A crew neck is a familiar choice for everyday wear, while a higher neck can offer more coverage around the collar. Longer hems are useful when you want a shirt to stay tucked, and cuffs that sit smoothly beneath a jacket or sweater can make a noticeable difference during a full day outside. For a more personal fit, compare the garment measurements with a shirt or pair of long underwear you already enjoy wearing. A close fit generally works well as a foundation, but it should still allow comfortable movement through the shoulders, arms, waist and hips. If you are shopping for someone else, think about their usual clothing size, preferred fit and favorite outdoor routines rather than choosing by season alone. Base layers and thermals can be practical gifts for family members who enjoy early walks, outdoor games, travel, camping, watching school activities or simply keeping a spare layer nearby. They are also the kind of useful wardrobe staple that can become part of a daily routine, whether it is folded into a drawer at home or tucked into a weekend bag.

Weight is another helpful way to narrow the selection. Lightweight styles are a sensible place to start for transitional days, active plans or wearing beneath several other pieces. Midweight options offer a versatile middle ground for everyday outdoor time and cooler conditions. Heavier styles may appeal to people who spend extended periods outside with less continuous movement, or to anyone who prefers a substantial, cozy feel. Think about the complete outfit rather than judging one layer in isolation: a thinner base layer can work comfortably beneath a shirt, vest and jacket, while a thicker thermal may be better suited to a simpler combination. The right arrangement is often the one that lets you add or remove a layer easily as the day changes. Fabric choice is personal, too. Look closely at the fiber content, texture and care instructions, especially if the garment will be worn often or packed for travel. A soft hand feel may matter most to someone who is sensitive to rough textures, while easy-care instructions can be important for busy households, team trips and weekends away. Check the seams, cuffs and waistband for a smooth, comfortable finish, and consider whether the stretch and cut allow natural movement when sitting, bending, reaching or walking. For bottoms, pay attention to the rise, inseam and ankle opening so they layer neatly beneath pants without feeling restrictive. For tops, look for sleeve lengths that work with the coats and shirts you already own. Care labels are worth reading before purchase: follow the recommended washing and drying instructions, avoid assuming that every fabric should be treated the same way, and give garments enough room to dry fully before folding them away. When packing for cooler travel, roll or fold a base layer where it can be reached easily, and bring an extra top or bottom if your plans include time outdoors. Shoppers building a wardrobe for themselves can compare styles by weight, fit and coverage; shoppers looking for a useful gift can begin with versatile colors and familiar silhouettes. For additional options, explore Men's Thermal Base Layers. With a little attention to fit, fabric, weight and care, it is easier to choose base layers and thermals that suit the way you spend time outside—from the first cool morning of the season through the colder days ahead.

FAQs

Base layers and thermals are designed to keep you comfortable in cool and cold conditions by wicking moisture away from your skin and trapping body heat. This helps regulate your temperature, keeps you dry during active pursuits, and adds an extra layer of softness and comfort under your clothing.

The most common fabrics for base layers and thermals are merino wool and synthetic materials like polyester blends. Merino wool is appreciated for its natural warmth, softness, and odor resistance, while synthetics are known for their durability, quick-drying properties, and ability to handle high-intensity activity.

Base layers come in lightweight, midweight, and heavyweight options. Lightweight base layers are ideal for milder temperatures or high-output activities, midweight offers versatility for a range of conditions, and heavyweight thermals provide maximum warmth for very cold or low-activity days.

Absolutely. While base layers and thermals are popular for hiking, skiing, and camping, they’re also great for everyday wear, commuting, traveling, or simply staying cozy at home during cooler months.

Look for features such as moisture-wicking fabrics, flatlock seams to prevent chafing, 4-way stretch for mobility, and materials that feel soft against the skin. These details contribute to all-day comfort and lasting performance.

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Base Layers & Thermals

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