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Polyester Long Underwear

Shop polyester long underwear and compare base layer styles to find your preferred fit. Check each item’s fabric composition, sizing and care instructions to help narrow your choice.

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Kids' Wicked Warm Midweight Long Underwear, Pants
L.L.Bean Kids' Wicked Warm Midweight Long Underwear, Pants
A pair of black midweight polyester long underwear pants that keep kids warm and dry during winter.
(0)
$24.95 $24.95
SALE
$24.95 $24.95
SALE
Kids' Wicked Warm Midweight Long Underwear, Top Print
L.L.Bean Kids' Wicked Warm Midweight Long Underwear, Top Print
A midweight, multi-color printed top in soft polyester that keeps kids warm and dry all winter.
(83)
$29.95 $29.95
SALE
$29.95 $29.95
SALE
Kids' Wicked Warm Midweight Long Underwear, Top
L.L.Bean Kids' Wicked Warm Midweight Long Underwear, Top
A black midweight polyester long underwear top with thumbhole cuffs, perfect for keeping kids warm.
(0)
$24.95 $24.95
SALE
$24.95 $24.95
SALE
Toddlers' Wicked Warm Midweight Underwear Set, Print
L.L.Bean Toddlers' Wicked Warm Midweight Underwear Set, Print
A moisture-wicking, midweight polyester underwear set in a colorful print to keep toddlers warm and dry.
(59)
$44.95 $44.95
SALE
$44.95 $44.95
SALE
Kids' Wicked Warm Midweight Long Underwear, Pants Print
L.L.Bean Kids' Wicked Warm Midweight Long Underwear, Pants Print
A midweight, multi-color printed polyester pant that keeps kids warm and dry during winter play.
(84)
$29.95 $29.95
SALE
$29.95 $29.95
SALE
Women's L.L.Bean Synthetic Silk Base Layer Pants
L.L.Bean Women's L.L.Bean Synthetic Silk Base Layer Pants
A lightweight black synthetic-polyester base layer providing smooth, comfortable warmth without bulk.
(0)
$44.95 $44.95
SALE
$44.95 $44.95
SALE
Kids' Wicked Warm Long Underwear, Expedition-Weight Pants
L.L.Bean Kids' Wicked Warm Long Underwear, Expedition-Weight Pants
A warm, moisture-wicking base layer with four-way stretch and brushed fleece lining for active kids.
(81)
$32.95 $32.95
SALE
What customers like:
Lightweight
No annoying seams
True to size
Warm
Super soft
$32.95 $32.95
SALE
Men's L.L.Bean Synthetic Silk Base Layer Pants
L.L.Bean Men's L.L.Bean Synthetic Silk Base Layer Pants
A lightweight black polyester base layer providing smooth, close-fitting warmth without bulk.
(0)
$44.95 $44.95
SALE
$44.95 $44.95
SALE
Kids' Wicked Warm Long Underwear, Expedition-Weight Print Pants
L.L.Bean Kids' Wicked Warm Long Underwear, Expedition-Weight Print Pants
A pair of blue printed synthetic pants with lightweight fleece lining, moisture-wicking and quick-drying performance.
(0)
$39.95 $39.95
SALE
$39.95 $39.95
SALE
Little Kids' Wicked Warm Long Underwear, Expedition-Weight Print Top
L.L.Bean Little Kids' Wicked Warm Long Underwear, Expedition-Weight Print Top
A blue printed expedition-weight top with lightweight fleece lining, moisture-wicking synthetic fabric, and four-way stretch.
(0)
$44.95 $44.95
SALE
$44.95 $44.95
SALE
Men's L.L.Bean Simple Soft Base Layer, Crew
L.L.Bean Men's L.L.Bean Simple Soft Base Layer, Crew
A lightweight, moisture-wicking synthetic base layer in faded sage heather, perfect for everyday warmth and layering.
(0)
$54.95 $54.95
SALE
$54.95 $54.95
SALE
Men's L.L.Bean Midweight Base Layer Pants
L.L.Bean Men's L.L.Bean Midweight Base Layer Pants
A versatile midweight base layer in pinewood green, made from recycled polyester for warmth and moisture-wicking comfort.
(0)
$54.95 $54.95
SALE
$54.95 $54.95
SALE
Kids' Wicked Warm Long Underwear, Expedition-Weight Top
L.L.Bean Kids' Wicked Warm Long Underwear, Expedition-Weight Top
A pink expedition-weight base layer top made from moisture-wicking, quick-drying synthetic fleece with four-way stretch.
(79)
$39.95 $39.95
SALE
$39.95 $39.95
SALE
Women's L.L.Bean Synthetic Silk Base Layer Top, Long-Sleeve Scoopneck
L.L.Bean Women's L.L.Bean Synthetic Silk Base Layer Top, Long-Sleeve Scoopneck
A lightweight white polyester base layer with a silk-like feel, scoop neckline, and added warmth.
(0)
$44.95 $44.95
SALE
$44.95 $44.95
SALE
Men's L.L.Bean Heavyweight Base Layer Pant
L.L.Bean Men's L.L.Bean Heavyweight Base Layer Pant
A heavyweight base layer pant in midnight black, made from recycled polyester with moisture-wicking properties.
(0)
$64.95 $64.95
SALE
$64.95 $64.95
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 heavyweight base layer pant in kelp green camo, made from recycled polyester for warmth and moisture-wicking.
(0)
$64.95 $64.95
SALE
$64.95 $64.95
SALE
Women's L.L.Bean Midweight Base Layer Pants
L.L.Bean Women's L.L.Bean Midweight Base Layer Pants
A versatile midweight base layer with moisture-wicking, quick-drying fabric made from recycled polyester.
(0)
$54.95 $54.95
SALE
$54.95 $54.95
SALE
Women's LLB Simple Soft Base Layer Camisole
L.L.Bean Women's LLB Simple Soft Base Layer Camisole
A lightweight, moisture-wicking black camisole made from 94% polyester and 6% spandex for everyday warmth.
(0)
$39.95 $39.95
SALE
$39.95 $39.95
SALE
Women's L.L.Bean Heayweight Base Layer Pant, Print
L.L.Bean Women's L.L.Bean Heayweight Base Layer Pant, Print
A blue heavyweight base layer pant made from recycled polyester, offering warmth, moisture-wicking, and odor control.
(0)
$64.95 $64.95
SALE
$64.95 $64.95
SALE
Women's L.L.Bean Simple Soft Base Layer, Crew
L.L.Bean Women's L.L.Bean Simple Soft Base Layer, Crew
A lightweight, moisture-wicking base layer crewneck made from 94% polyester and 6% spandex in sea salt.
(127)
$54.95 $54.95
SALE
What customers like:
Great fit
Smooth fabric
Softness
Dino style
Material
$54.95 $54.95
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 heavyweight, moisture-wicking base layer made from recycled polyester with thumb holes and anti-microbial finish.
(0)
$64.95 $64.95
SALE
$64.95 $64.95
SALE
Men's L.L.Bean Synthetic Silk Base Layer Top, Long-Sleeve Crew
L.L.Bean Men's L.L.Bean Synthetic Silk Base Layer Top, Long-Sleeve Crew
A lightweight black synthetic-polyester baselayer top offering smooth, close-fitting warmth without bulk.
(0)
$44.95 $44.95
SALE
$44.95 $44.95
SALE
Women's L.L.Bean Heavyweight Base Layer Pants
L.L.Bean Women's L.L.Bean Heavyweight Base Layer Pants
A pair of midnight black heavyweight base layer pants made from recycled polyester, perfect for outdoor adventures.
(0)
$64.95 $64.95
SALE
$64.95 $64.95
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 midnight black, heavyweight base layer top made from recycled polyester, designed to keep you warm and dry.
(0)
$64.95 $64.95
SALE
$64.95 $64.95
SALE

Polyester Long Underwear

Polyester Long Underwear is a good place to begin when you’re looking to round out the essentials in your wardrobe. Finding the right pieces starts with the details you notice when getting dressed: the neckline you prefer, where a waistband sits and whether sleeves and legs fall at the length you like. Think about the clothes you already own and the shapes you tend to reach for, rather than choosing by size alone. A familiar size label is a starting point, but measurements and fit descriptions offer a clearer picture of how an individual piece is cut. Compare chest, waist and hip measurements with the size chart, and check any available information about sleeve length and inseam. Those small checks can help you make a more thoughtful choice, especially if it has been a while since you last bought long underwear.

When comparing polyester long underwear, look beyond the photograph and spend a little time with each item’s description. The title identifies the material, while the fabric details provide the full composition and polyester percentage. Read those details alongside the care instructions so you know what you’re choosing and how it fits into your laundry routine. For tops, consider whether you prefer a simple neckline or an opening you can adjust; for bottoms, pay attention to the waistband, rise and cuffs described in the listing. If you’re buying separate pieces, check the sizing for each rather than assuming the same size will be right for both. Your favorite shirt and best-fitting pants may already tell that story: proportions are personal, and a little attention to them is more useful than relying on a matching label. Let your own preferences guide the comparison.

Long underwear can also be a thoughtful, practical gift for someone whose size and style you know well. Perhaps your partner keeps a neatly folded drawer of everyday essentials, or an adult family member has mentioned replacing a few older pieces. Take your cue from what they already choose for themselves—the necklines, lengths and fit they like—rather than guessing at a different style. If you’re shopping for your own household, the same approach helps keep the purchase focused: take a quick look through the drawer, see what’s missing and decide whether you need a top, bottoms or both. Choosing Polyester Long Underwear doesn’t have to mean replacing everything at once. Start with the pieces that make sense for the person wearing them, compare the individual details and build an assortment that reflects real preferences rather than an imagined checklist.

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