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Warm Undergarments

Find warm undergarments for the first layer of your outfit. Explore base-layer styles with your preferred fit in mind, and check each item’s sizing and product details to choose pieces that work under your other clothing.

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Toddlers' Wicked Warm Midweight Underwear Set, Print
L.L.Bean Toddlers' Wicked Warm Midweight Underwear Set, Print
A midweight printed polyester underwear set that wicks moisture and retains warmth for comfortable cold-weather layering.
(59)
$44.95 $44.95
SALE
What customers like:
Comfortable for kids
Fun rainbow dot pattern
Provides excellent warmth
Durable material
Adjustable cuffs for better fit
$44.95 $44.95
SALE
Men's Scotch Plaid Flannel Boxers
L.L.Bean Men's Scotch Plaid Flannel Boxers
A gray plaid boxer in 100% Portuguese cotton flannel, brushed on both sides for warmth.
(1,634)
$39.95 $39.95
SALE
What customers like:
Softness
Excellent quality
Warmth
Roomy design
Comfortable fit
$39.95 $39.95
SALE
Toddlers' Wicked Warm Midweight Underwear Set
L.L.Bean Toddlers' Wicked Warm Midweight Underwear Set
A blue, solid polyester underwear set that traps heat, wicks moisture, and stays put during play.
(0)
$39.95 $39.95
SALE
$39.95 $39.95
SALE
Women's Silk Underwear, Scoopneck
L.L.Bean Women's Silk Underwear, Scoopneck
A black silk long-sleeve undershirt offering comfortable warmth without bulk, perfect as a first layer.
(639)
$54.95 $45.99
SALE
What customers like:
Great fit
Lightweight
Warmth
Silky feel
Comfortable
$54.95 $45.99
SALE
Kids' Wicked Warm Midweight Long Underwear, Top Print
L.L.Bean Kids' Wicked Warm Midweight Long Underwear, Top Print
A colorful midweight synthetic base layer with toasty warmth, moisture resistance and thumbhole cuffs for cold-weather comfort.
(83)
$29.95 $29.95
SALE
$29.95 $29.95
SALE
Men's Double-Layer Underwear, Pants
L.L.Bean Men's Double-Layer Underwear, Pants
A blue double-layer thermal pant with soft cotton interior, warm merino-wool blend exterior, and flatlock seams.
(392)
$54.95 $54.95
SALE
$54.95 $54.95
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 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 Cresta Midweight 250 Pants
L.L.Bean Men's Cresta Midweight 250 Pants
A versatile base layer made of itch-free merino wool, offering warmth and odor resistance in dark black.
(439)
$99.95 $99.95
SALE
What customers like:
Great color
Easy to wash
Comfortable and soft
Very versatile
Excellent warmth
$99.95 $99.95
SALE
Kids' Wicked Warm Midweight Long Underwear, Pants Print
L.L.Bean Kids' Wicked Warm Midweight Long Underwear, Pants Print
A multicolor synthetic midweight base layer with moisture-wicking warmth, covered waistband and stay-put cuffs for kids.
(84)
$29.95 $29.95
SALE
$29.95 $29.95
SALE
Kids' Wicked Warm Midweight Long Underwear, Pants
L.L.Bean Kids' Wicked Warm Midweight Long Underwear, Pants
A purple, midweight polyester base layer with moisture-wicking warmth, self-fabric cuffs, and a comfortable covered waistband.
(0)
$24.95 $24.95
SALE
$24.95 $24.95
SALE
Men's Double-Layer Underwear, Crewneck
L.L.Bean Men's Double-Layer Underwear, Crewneck
A blue, double-layer thermal crewneck with soft cotton lining and durable wool-blend outer fabric for warmth and comfort.
(376)
$54.95 $54.95
SALE
What customers like:
Perfect fit
Exceptional warmth
High comfort
Well made
Soft feel
$54.95 $54.95
SALE
Kids' Wicked Warm Midweight Long Underwear, Top
L.L.Bean Kids' Wicked Warm Midweight Long Underwear, Top
A blue, midweight polyester base-layer top that traps warmth, wicks moisture, and features thumbhole cuffs.
(0)
$24.95 $24.95
SALE
$24.95 $24.95
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 base layer made with recycled polyester, offering moisture-wicking, quick-drying warmth and odor control.
(0)
$64.95 $64.95
SALE
$64.95 $64.95
SALE
Infants' Wicked Warm Underwear, One-Piece, Print
L.L.Bean Infants' Wicked Warm Underwear, One-Piece, Print
A colorful polyester one-piece base layer that traps warmth, wicks moisture, and offers easy snap entry.
(48)
$44.95 $44.95
SALE
$44.95 $44.95
SALE
Men's Silk Underwear, Pants
L.L.Bean Men's Silk Underwear, Pants
A lightweight, solid red silk base layer pant offering warmth and comfort without bulk.
(486)
$54.95 $45.99
SALE
What customers like:
Provides warmth
Well made and sturdy
Prevents chafing
Comfortable fit
Lightweight and thin
$54.95 $45.99
SALE
Women's L.L.Bean Heavyweight Base Layer Crew Top
L.L.Bean Women's L.L.Bean Heavyweight Base Layer Crew Top
A black heavyweight base layer made with recycled polyester, offering moisture-wicking, quick-drying warmth and thumb-hole sleeves.
(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 odor control for warmth.
(0)
$64.95 $64.95
SALE
$64.95 $64.95
SALE
Kids' Wicked Warm Long Underwear, Expedition-Weight Top
L.L.Bean Kids' Wicked Warm Long Underwear, Expedition-Weight Top
A pink, expedition-weight synthetic base layer with fleece lining, moisture-wicking fabric and four-way stretch for easy movement.
(79)
$39.95 $39.95
SALE
$39.95 $39.95
SALE
Women's L.L.Bean Midweight Base Layer Crew Top
L.L.Bean Women's L.L.Bean Midweight Base Layer Crew Top
A black midweight synthetic base layer that wicks moisture, resists odor and offers stretchy, movement-friendly warmth.
(0)
$54.95 $54.95
SALE
$54.95 $54.95
SALE
Kids' Wicked Warm Long Underwear, Expedition-Weight Print Pants
L.L.Bean Kids' Wicked Warm Long Underwear, Expedition-Weight Print Pants
A warmest-weight blue printed base layer with moisture-wicking, quick-drying fleece-lined polyester-spandex fabric.
(0)
$39.95 $39.95
SALE
$39.95 $39.95
SALE
Men's Silk Underwear, Crewneck
L.L.Bean Men's Silk Underwear, Crewneck
A lightweight red silk crewneck base layer offering strong comfort and warmth without bulk.
(410)
$54.95 $45.99
SALE
What customers like:
Fast drying
Provides warmth
Feels like real silk
Travel friendly
Comfortable fit
$54.95 $45.99
SALE
Men's Two-Layer Union Suit
L.L.Bean Men's Two-Layer Union Suit
A red wool-blend union suit with a soft cotton lining, flatlock seams, and flexible warmth for cold-weather comfort.
(541)
$99.95 $99.95
SALE
What customers like:
Functional
Fits well
Well-made
Warmth
Comfortable
$99.95 $99.95
SALE
Women's Cresta Midweight 250 Crew Top
L.L.Bean Women's Cresta Midweight 250 Crew Top
A purple, itch-free merino wool base layer that wicks moisture, resists odor and provides versatile warmth.
(364)
$99.95 $99.95
SALE
$99.95 $99.95
SALE
Men's L.L.Bean Heavyweight Base Layer Pant, Print
L.L.Bean Men's L.L.Bean Heavyweight Base Layer Pant, Print
A green heavyweight base layer pant made with recycled polyester, offering moisture-wicking, quick-drying, odor-resistant warmth.
(0)
$64.95 $64.95
SALE
$64.95 $64.95
SALE

Warm Undergarments

Warm undergarments are clothing layers worn beneath an outfit for added warmth. Often described as thermal underwear or base layers, they form the starting point of a layered wardrobe, with fit and personal preference playing an important part in the choice. Because these garments sit closest to the body, the details deserve attention: the shape of a neckline, the position of a waistband, the length of a sleeve and the way one layer meets another. A familiar size is a useful starting point, but measurements and the individual garment’s size information offer a clearer picture than the size label alone. Some people prefer a close silhouette beneath their clothes; others like a little more room. Neither preference calls for accepting pinching, pulling or extra fabric that gathers where it is not wanted. Think about a sleeve beneath another sleeve, a cuff at the ankle or a waistband beneath a second waistband. These small points of overlap can matter just as much as the overall size. The clothes worn over an undergarment are part of the decision, too. A narrow pant leg leaves a different amount of room than a relaxed one, while an open neckline reveals more of the layer beneath it than a higher neckline does. Product photographs, measurements and fit descriptions can help clarify those relationships before a choice is made. Warmth is the defining consideration for this collection, but it is not a reason to overlook proportion or personal style. A layer that fits into an existing wardrobe is a more considered choice than one selected on a warmth description alone. For another view of this wardrobe category, explore Cold Weather Underwear, keeping the same attention to the details of each garment. The aim is a thoughtful selection of undergarments that reflects how someone likes their clothes to fit, feel and look together.

Material composition is another useful point of comparison, and the most reliable information comes from the details attached to each garment. A fabric name does not tell the whole story of an undergarment, nor does a photograph establish how it will feel against the skin. Composition, fabric description, construction and care instructions all contribute to a fuller understanding. For anyone with a known fabric preference, checking the complete composition is particularly worthwhile rather than relying on a broad category name. The same attention applies to fabric weight: where a weight or thickness is provided, it offers another detail to consider alongside the garment’s cut and measurements, not a substitute for them. Personal preferences can be quite specific. One person may pay close attention to the inside of a seam, while another notices the feel of a collar or the placement of a label first. Those preferences are worth keeping in mind when comparing the information provided. Fit is similarly individual from one part of the body to another. Sleeve length, torso length, rise and inseam may influence a choice differently, especially when someone falls between sizes. Where separate garments are offered, checking each size independently avoids assuming that the same size will be right throughout. Trying layers together also gives a more realistic impression than considering an undergarment by itself. Sitting in a chair, bending a knee and reaching forward can reveal a waistband that presses or a sleeve that pulls back. These are ordinary movements, but they make the fit easier to judge. A mirror can show whether fabric gathers beneath an outer layer; movement helps establish whether the proportions suit the wearer. Rather than treating every base layer as interchangeable, consider the shape, feel and finish of each garment as parts of the whole. Those details make the choice personal without making it complicated.

Care and durability belong in the comparison from the beginning, not only after an undergarment reaches the laundry basket. Check the garment’s care label for washing and drying directions, and consider how those instructions fit into the household routine. It is better to know in advance that a garment calls for a different approach than to discover it after washing several layers together. Follow the stated instructions rather than assuming that all thermal underwear can be treated alike. Any guidance about water temperature, drying method or other care steps should come from the garment’s own label. Durability also deserves a specific, practical look: use the construction information supplied for the garment rather than taking a category name as a promise about how long it will last. Over time, checking seams, cuffs and waistbands gives a clearer sense of a garment’s condition than judging by appearance alone. A drawer arranged so that undergarments are easy to see can also make getting dressed less of a search, particularly in a household where several people have similar clothing. Keeping size and care information with a new garment until it has been tried on is a simple way to avoid confusion. Warm undergarments can be a thoughtful gift for someone whose preferences are well known, though close-to-body clothing makes accurate sizing especially important. The recipient’s usual measurements, preferred fit and fabric preferences are more useful than a guess based on another person’s wardrobe. Care expectations matter here as well; a gift should suit the person receiving it, including the way they look after their clothes. For a personal purchase or a practical gift, the strongest starting point is the same: warmth, considered alongside the details that make a garment right for its wearer. Familiar proportions, clearly understood care requirements and attention to individual preferences give this foundational part of a wardrobe the consideration it deserves.
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