Thermal Underwear Tops

Thermal underwear tops are the perfect companions for chilly days, offering a cozy layer of warmth that keeps you comfortable no matter where your adventures take you. Crafted with quality materials, these tops provide lasting value and durability, ensuring you stay toasty season after season. Ideal for layering or wearing on their own, they blend seamlessly with your outdoor gear, making them a versatile addition to any wardrobe. Whether you're hiking through snow-covered trails or simply enjoying a brisk morning walk, thermal underwear tops offer the reliable warmth and comfort you need to fully embrace the great outdoors.

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Women's Silk Underwear, Scoopneck

A women's cream silk long-sleeve undershirt offering comfortable warmth without bulk.

Pros: Great fit Soft material Lightweight Silky feel Comfortable warmth
Women's Cresta Midweight 250 Crew Top

A midweight merino wool crew top in eggplant heather, designed to wick sweat and resist odor.

Pros: Perfect base layer Breathability Warmth Softness Regulates body temperature
Men's Signature Waffle Crew
Price was from: $89 now: $74.99

A slim-fitting, deep port thermal crew made from breathable 100% waffle-knit cotton for cooler weather.

Pros: High quality Great color Good fit Comfortable waffle knit Excellent warmth
Men's Cresta Wool Midweight 250 Crew Top

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

Pros: Great fit Comfortable feel Durable material Soft fabric Excellent warmth
Women's Silk Underwear, Turtleneck

A lightweight, cream silk turtleneck providing breathable warmth without bulk, perfect under casual or active outfits.

Pros: Excellent customer service Thin and comfortable Soft and warm material Lightweight and warm Perfect turtleneck fit
Men's Silk Underwear, Crewneck

A lightweight, dark flint gray crewneck made from 100% silk, perfect as a warm base layer.

Pros: High fabric quality Durable material Great for travel Comfortable fit Excellent warmth
Men's Double-Layer Underwear, Crewneck
Price was from: $49.95 now: $39.99

A gray wool-blend crewneck sweatshirt featuring double-layer thermal construction for superior warmth.
Men's Cresta Midweight 250 Quarter-Zip Top

A midweight merino wool quarter-zip top in dark black, offering warmth, sweat-wicking, and odor resistance.

Pros: Keeps you warm Excellent base layer Comfort Durability Versatility
Women's Cresta Midweight 250 T-Zip Top

An eggplant heather midweight merino wool top that wicks sweat, resists odor, and keeps you warm.

Pros: Good quality Warmth True to size Versatile Comfortable
Men's Cresta Ultralight 150 Crew Top

An alloy gray, extra-large base layer made of 100% merino wool, offering warmth and comfort year-round.

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

An alloy gray, form-fitting crew top made of 100% merino wool, perfect as a lightweight base layer.

Pros: Not itchy Lightweight Warmth Versatile Comfortable
Women's L.L.Bean Simple Soft Base Layer, Crew

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

Pros: Great fit Smooth fabric Softness Dino style Material
Women's Cresta Wool Ultralight 150 Base Layer, Hoodie

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 ultralight, alloy gray 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
Women's Cresta Wool Ultralight 150 Turtleneck

An ultralight, form-fitting turtleneck made of 100% Merino wool, in alloy gray, with thumbhole cuffs.

Pros: Cleanliness High quality Warmth Comfortable fabric Low maintenance
Men's Cresta Ultralight 150 Crew Top, Stripe

A remarkably soft and warm striped crew top made of 100% merino wool with thumbhole cuffs.
Women's Cresta Ultralight 150 Crew Top, Stripe

An itch-free 100% merino wool base layer, perfect for cold-weather sports, available in ocean waves and storm teal.

Pros: Ideal as long underwear Provides excellent warmth Soft merino wool material
Men's Cresta Ultralight 150 Hoodie, Stripe

A form-fitting, 100% merino wool hoodie in regatta blue, perfect as a base layer for winter sports.
Men's L.L.Bean Simple Soft Base Layer, Crew

A lightweight, moisture-wicking synthetic base layer crewneck in faded sage heather, perfect for everyday warmth.
Men's L.L.Bean Heavyweight Baselayer Hoodie

A midnight black hoodie made from recycled polyester blend, offering warmth, moisture-wicking, and odor control.
Women's Cresta Utralight 150 Crew Top, Print
Price was from: $79 now: $34.99

A lightweight, form-fitting merino wool crew top in sea salt camo, perfect for any season.
Men's L.L.Bean Heavyweight Base Layer Hoodie, Print

A heavyweight base layer hoodie in kelp green camo, made from recycled polyester, wicks moisture and controls odor.
Men's L.L.Bean Heavyweight Base Layer Crew Top, Print

A heavyweight, moisture-wicking, and quick-drying base layer with anti-microbial finish in kelp green camo.
Women's L.L.Bean Midweight Base Layer Crew Top

A midweight crew top in midnight black, made from recycled polyester, wicks moisture and resists odor.

Thermal Underwear Tops

Whether you’re heading out for an early-morning hike, layering up for a chilly evening by the campfire, or simply savoring the quiet comfort of a brisk walk around the neighborhood, thermal underwear tops are a true staple for anyone who enjoys time outdoors when the temperature dips. These versatile layers are designed to help you stay warm and comfortable, even when the air turns crisp. Made from a range of materials, including soft cotton blends and lightweight synthetics, thermal tops trap warmth close to your body while wicking away moisture, so you stay dry and cozy through every adventure. They’re ideal for everything from autumn leaf-peeping trips to winter snowshoeing excursions and spring mornings when the frost still lingers. For many, a reliable thermal top is the first thing packed for a weekend at the cabin or a family ski trip, and it’s just as handy for everyday errands or relaxing at home on a cool day.

Thermal underwear tops also make thoughtful, practical gifts for anyone who appreciates time outdoors or simply enjoys staying warm and comfortable throughout the colder months. Whether it’s a parent who loves early-morning dog walks, a college student heading off to a drafty dorm, or a friend who spends weekends camping or tailgating, these tops offer lasting value and comfort that’s sure to be appreciated. Look for features that matter most to your lifestyle or the recipient’s needs—like flatlock seams that help prevent chafing, stretch fabric that allows for easy movement, and timeless, easy-to-layer designs that work well under everything from flannel shirts to insulated jackets. The best thermal underwear tops are durable enough to stand up to frequent wear and washing, maintaining their shape and softness season after season.

When choosing your next thermal top, consider how it will fit into your routine. Some folks prefer the classic comfort of a crewneck, while others like the extra coverage of a mock or turtleneck style. If you’re planning to layer up for outdoor sports or work, lightweight options can be especially useful, providing warmth without bulk so you can move freely. For those who spend long hours outside, quick-drying and moisture-wicking materials are a smart choice, helping you stay comfortable even as your activity level changes. And while July may bring warm days, it’s never too early to prepare for the cooler weather ahead—having a few reliable thermal tops on hand means you’ll be ready when the first chill arrives. For men seeking high-quality options designed for lasting comfort and performance, our collection of Men's Thermal Base Layers offers a range of styles and features to suit every need. No matter how you enjoy the outdoors, a dependable thermal underwear top is a simple, effective way to add warmth and comfort to your day—making every moment outside just a little more enjoyable.