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Thermal Base Layers for Cold Weather

Find thermal base layers for cold weather to start your layering system. Browse the selection and compare each item’s fit, fabric and care details to choose base layers that suit your preferences and fit beneath your other clothing.

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Men's Two-Layer Union Suit
L.L.Bean Men's Two-Layer Union Suit
A gray, supersoft wool-blend one-piece with two-layer warmth, flatlock seams and flexible rib-knit cuffs.
(541)
$99.95 $99.95
SALE
What customers like:
Functional
Fits well
Well-made
Warmth
Comfortable
$99.95 $99.95
SALE
Men's Cresta Wool Midweight 250 Crew Top
L.L.Bean Men's Cresta Wool Midweight 250 Crew Top
A blue 100% merino wool base layer that wicks moisture, resists odor and provides versatile warmth.
(489)
$99.95 $99.95
SALE
What customers like:
Perfect fit
Soft and comfortable
Durable fabric
Available in big and tall sizes
Great warmth
$99.95 $99.95
SALE
Men's Silk Underwear, Pants
L.L.Bean Men's Silk Underwear, Pants
A strong, lightweight black silk base layer offering warmth and comfort without added bulk.
(486)
$54.95 $45.99
SALE
What customers like:
Great fit
Quality
Warmth
Comfortable
Versatile for weather
$54.95 $45.99
SALE
Men's Cresta Midweight 250 Pants
L.L.Bean Men's Cresta Midweight 250 Pants
A versatile base layer made of 100% merino wool that wicks sweat, resists odor, and keeps you warm.
(439)
$99.95 $99.95
SALE
What customers like:
Soft material
Odor resistant
Versatile use
Great warmth
Comfortable fit
$99.95 $99.95
SALE
Women's Silk Underwear, Turtleneck
L.L.Bean Women's Silk Underwear, Turtleneck
A lightweight black silk turtleneck base layer providing breathable warmth without added bulk.
(424)
$69.95 $58.99
SALE
What customers like:
Excellent customer service
Comfortable thinness
Great turtleneck fit
Lightweight and warm
Perfect for layering
$69.95 $58.99
SALE
Men's Silk Underwear, Crewneck
L.L.Bean Men's Silk Underwear, Crewneck
A lightweight red silk crewneck base layer offering strong warmth and comfort without bulk.
(410)
$54.95 $45.99
SALE
What customers like:
Fast drying
Provides warmth
Feels like real silk
Comfortable fit
Easy to clean
$54.95 $45.99
SALE
Men's Double-Layer Underwear, Pants
L.L.Bean Men's Double-Layer Underwear, Pants
A gray two-layer base layer with soft cotton inside and durable merino wool-nylon exterior for cold-weather comfort.
(392)
$54.95 $54.95
SALE
$54.95 $54.95
SALE
Women's Cresta Midweight 250 Pants, High-Rise Slim-Leg
L.L.Bean Women's Cresta Midweight 250 Pants, High-Rise Slim-Leg
A black high-rise base layer in 100% merino wool, naturally wicking, odor-resistant, warm, and smooth-fitting.
(390)
$99.95 $99.95
SALE
What customers like:
Great fit
Perfect base layer
Warmth
Non-itchy
Comfortable fabric
$99.95 $99.95
SALE
Men's Double-Layer Underwear, Crewneck
L.L.Bean Men's Double-Layer Underwear, Crewneck
A gray, two-layer thermal crewneck with soft cotton inside, wool-blend outer knit, and itch-free warmth.
(376)
$54.95 $54.95
SALE
What customers like:
Great fit
Very cozy
Exceptional warmth
Comfortable feel
Well made
$54.95 $54.95
SALE
Men's Cresta Midweight 250 Quarter-Zip Top
L.L.Bean Men's Cresta Midweight 250 Quarter-Zip Top
A black 100% merino wool quarter-zip base layer naturally wicks moisture, resists odor, and provides warmth.
(375)
$120 $120
SALE
What customers like:
Keeps you warm
Excellent base layer
Comfort
Durability
Versatility
$120 $120
SALE
Women's Cresta Midweight 250 T-Zip Top
L.L.Bean Women's Cresta Midweight 250 T-Zip Top
A black merino wool base layer offering sweat-wicking warmth, odor resistance, and thumbhole cuffs.
(203)
$120 $120
SALE
What customers like:
Well-made
Warmth
True to size
Versatile
Comfortable
$120 $120
SALE
Men's Cresta Wool Ultralight 150 Pants
L.L.Bean Men's Cresta Wool Ultralight 150 Pants
A gray lightweight 100% merino wool base layer with moisture-wicking warmth, odor resistance and gusseted comfort.
(142)
$89.95 $89.95
SALE
What customers like:
Lightweight
Warm without being bulky
Stylish
Durable
Comfortable
$89.95 $89.95
SALE
Men's L.L.Bean Simple Soft Base Layer, Pants
L.L.Bean Men's L.L.Bean Simple Soft Base Layer, Pants
A lightweight black synthetic base layer pant with moisture-wicking, quick-drying, pill-resistant fabric and a close-to-body fit.
(86)
$54.95 $54.95
SALE
What customers like:
Ideal for layering
Provides warmth
Lightweight feel
$54.95 $54.95
SALE
Kids' Wicked Warm Midweight Long Underwear, Pants Print
L.L.Bean Kids' Wicked Warm Midweight Long Underwear, Pants Print
A multicolor polyester midweight base layer that traps warmth and wicks moisture during winter play.
(84)
$29.95 $24.99
SALE
$29.95 $24.99
SALE
Kids' Wicked Warm Midweight Long Underwear, Top Print
L.L.Bean Kids' Wicked Warm Midweight Long Underwear, Top Print
A multicolor synthetic midweight base layer with thumbhole cuffs that traps warmth and wicks moisture.
(83)
$29.95 $29.95
SALE
What customers like:
Comfortable cut
Makes a great gift
Attractive design
Affordable price
Good fit
$29.95 $29.95
SALE
Kids' Wicked Warm Long Underwear, Expedition-Weight Pants
L.L.Bean Kids' Wicked Warm Long Underwear, Expedition-Weight Pants
A black synthetic base layer with brushed fleece warmth, moisture-wicking fabric, and four-way stretch for winter.
(81)
$32.95 $32.95
SALE
What customers like:
Lightweight
No annoying seams
True to size
Warm
Super soft
$32.95 $32.95
SALE
Kids' Wicked Warm Long Underwear, Expedition-Weight Top
L.L.Bean Kids' Wicked Warm Long Underwear, Expedition-Weight Top
A moisture-wicking, quick-drying kids' base layer with lightweight fleece lining and four-way stretch for easy movement.
(79)
$39.95 $39.95
SALE
What customers like:
Fits well
Moisture-wicking
Daughter likes jacket
Warm
Comfortable
$39.95 $39.95
SALE
Women's Cresta Ultralight 150 Crew Top, Stripe
L.L.Bean Women's Cresta Ultralight 150 Crew Top, Stripe
A multicolor, itch-free 100% merino wool base layer with moisture-wicking comfort, odor resistance and thumbhole cuffs.
(67)
$89.95 $75.99
SALE
What customers like:
Ideal as long underwear
Provides excellent warmth
Soft merino wool material
$89.95 $75.99
SALE
Men's Cresta Ultralight 150 Turtleneck, Stripe
L.L.Bean Men's Cresta Ultralight 150 Turtleneck, Stripe
A blue, lightweight 100% merino wool turtleneck offering moisture-wicking, odor-resistant warmth for cold-weather activities.
(0)
$99.95 $84.99
SALE
$99.95 $84.99
SALE
Women's Cresta Ultralight 150 Turtleneck, Stripe
L.L.Bean Women's Cresta Ultralight 150 Turtleneck, Stripe
A striped 100% merino wool turtleneck that wicks moisture, resists odors, and layers comfortably during pursuits.
(0)
$99.95 $84.99
SALE
$99.95 $84.99
SALE
Men's L.L.Bean Heavyweight Base Layer Crew Top
L.L.Bean Men's L.L.Bean Heavyweight Base Layer Crew Top
A black heavyweight synthetic base layer with moisture-wicking, quick-drying fabric, odor control and thumbholes.
(0)
$64.95 $64.95
SALE
$64.95 $64.95
SALE
Men's L.L.Bean Heavyweight Base Layer Pant
L.L.Bean Men's L.L.Bean Heavyweight Base Layer Pant
A black heavyweight synthetic base layer pant with moisture-wicking, quick-drying fabric and ski-boot-friendly tapered legs.
(0)
$64.95 $64.95
SALE
$64.95 $64.95
SALE
Women's Cresta Ultralight 150 Hoodie, Stripe
L.L.Bean Women's Cresta Ultralight 150 Hoodie, Stripe
A lightweight multicolor merino wool hoodie with moisture-wicking, odor-resistant warmth and a helmet-compatible hood.
(0)
$99.95 $84.99
SALE
$99.95 $84.99
SALE
Men's L.L.Bean Midweight Base Layer Crew Top
L.L.Bean Men's L.L.Bean Midweight Base Layer Crew Top
A black, midweight synthetic base-layer top that wicks moisture, dries quickly, resists odor and stretches comfortably.
(0)
$54.95 $54.95
SALE
$54.95 $54.95
SALE

Thermal Base Layers for Cold Weather

Thermal Base Layers for Cold Weather are a starting point for getting dressed when the temperature drops and an extra layer feels welcome. On mornings when there’s frost along the window and everyone is gathering coats by the door, it helps to have the first part of your outfit already figured out. Start your selection with the clothes you plan to wear over it: a close-fitting shirt leaves a different amount of room than a generous sweater, and the waistband of your usual pants matters when adding a layer underneath. Look at each item’s fit description and measurements rather than relying on your usual size alone. A base layer should fit into your wardrobe as thoughtfully as any other everyday essential, with a shape and feel you’ll be happy to reach for throughout the cold-weather season.

Choosing between thermal base layers often comes down to small, personal preferences. Consider whether you prefer a higher or lower neckline, where you like a top’s hem to fall, and how sleeve and leg lengths compare with clothing you already own. Product photographs can offer a useful first impression, but individual descriptions and size charts are the better place to check the details. If you’re choosing both a top and a bottom, assess their sizes separately; the right fit on one half doesn’t always mean the same size will work on the other. Think through the whole outfit, too, including where cuffs, waistbands and hems will meet. Those overlapping edges are easy to overlook while shopping, yet they can make a difference in how an outfit feels once you’re dressed. Check the care instructions before deciding, especially if you prefer pieces that fit into an established laundry routine.

Thermal base layers can also make a thoughtful gift for someone who appreciates practical additions to a cold-weather wardrobe. The most useful clues are often familiar ones: the neckline they tend to choose, the fit of their favorite shirts, or whether they like their layers tucked in. When possible, confirm measurements instead of guessing, and consider which part of their wardrobe could use an addition rather than assuming they need a complete set. For your own collection, take a quick look at what’s already in the drawer before choosing. Replacing a poorly fitting piece or adding a second option to the weekly rotation can be more useful than buying several at once. Whether you’re shopping for yourself or someone close to you, focus on the individual details that make getting dressed for cold weather feel a little more straightforward—and leave more time for enjoying the day together.

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