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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 Print
L.L.Bean Kids' Wicked Warm Midweight Long Underwear, Pants Print
Midweight printed kids' long underwear pants in synthetic fabric, with moisture-wicking warmth and stay-put cuffs.
(84)
$29.95 $29.95
SALE
$29.95 $29.95
SALE
Kids' Wicked Warm Midweight Long Underwear, Top Print
L.L.Bean Kids' Wicked Warm Midweight Long Underwear, Top Print
A midweight kids' base-layer top in printed polyester with thumbhole cuffs for toasty warmth.
(83)
$29.95 $29.95
SALE
$29.95 $29.95
SALE
Toddlers' Wicked Warm Midweight Underwear Set, Print
L.L.Bean Toddlers' Wicked Warm Midweight Underwear Set, Print
A printed polyester toddler long-underwear set with midweight warmth and moisture-wicking comfort for 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
Kids' Wicked Warm Midweight Long Underwear, Pants
L.L.Bean Kids' Wicked Warm Midweight Long Underwear, Pants
Black midweight base-layer pants in 100% polyester, with moisture-wicking warmth, self-fabric cuffs and a nonbinding waistband.
(0)
$24.95 $24.95
SALE
$24.95 $24.95
SALE
Kids' Wicked Warm Midweight Long Underwear, Top
L.L.Bean Kids' Wicked Warm Midweight Long Underwear, Top
A purple midweight synthetic base-layer top with moisture-wicking warmth and thumbhole cuffs.
(0)
$24.95 $24.95
SALE
$24.95 $24.95
SALE
Kids' Wicked Warm Long Underwear, Expedition-Weight Top
L.L.Bean Kids' Wicked Warm Long Underwear, Expedition-Weight Top
A pink kids’ expedition-weight base-layer top in moisture-wicking polyester-Lycra, lined with lightweight fleece for warmth.
(79)
$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 kids’ thermal base-layer top in moisture-wicking polyester-spandex with fleece lining and four-way stretch.
(0)
$44.95 $44.95
SALE
$44.95 $44.95
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 white synthetic-polyester base layer offering smooth, close-fitting warmth without added bulk.
(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 black synthetic base-layer crewneck with moisture-wicking, quick-drying fabric, pill resistance, and thumbhole cuffs.
(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 pair of warm expedition-weight base-layer pants in blue printed fleece-lined polyester-spandex with moisture-wicking, quick-drying performance.
(0)
$39.95 $39.95
SALE
$39.95 $39.95
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 brown synthetic-polyester baselayer providing smooth, close-fitting warmth without bulk.
(0)
$44.95 $44.95
SALE
$44.95 $44.95
SALE
Women's L.L.Bean Midweight Base Layer Pants
L.L.Bean Women's L.L.Bean Midweight Base Layer Pants
A blue midweight base-layer pant in recycled polyester that wicks moisture, dries quickly, and resists odor.
(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
Men’s blue midweight base-layer pants in recycled polyester wick moisture, dry quickly, resist odors, and stretch comfortably.
(0)
$54.95 $54.95
SALE
$54.95 $54.95
SALE
Kids' Wicked Warm Long Underwear, Expedition-Weight Pants
L.L.Bean Kids' Wicked Warm Long Underwear, Expedition-Weight Pants
Kids’ expedition-weight base-layer pants in black, with moisture-wicking synthetic fabric and a brushed-fleece lining.
(81)
$32.95 $32.95
SALE
What customers like:
Lightweight
No annoying seams
True to size
Cozy
Super soft
$32.95 $32.95
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 in recycled polyester with moisture-wicking, quick-drying, odor-controlling fabric and tapered legs.
(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 brown polyester baselayer with a smooth, silk-like feel for warmth without bulk.
(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 black heavyweight base-layer pant in recycled polyester blend with moisture-wicking, quick-drying, odor-controlling, tapered legs.
(0)
$64.95 $64.95
SALE
$64.95 $64.95
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 recycled-polyester base-layer pant with moisture-wicking, quick-drying fabric and antimicrobial odor control.
(0)
$64.95 $64.95
SALE
$64.95 $64.95
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 black synthetic silk base layer top with smooth, form-fitting comfort for 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
Heavyweight base-layer pants in green recycled polyester, moisture-wicking, quick-drying and odor-controlling, with a wide waistband.
(0)
$64.95 $64.95
SALE
$64.95 $64.95
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 black base-layer top in recycled polyester, moisture-wicking, quick-drying, with thumb holes and odor control.
(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 black heavyweight base-layer top in recycled polyester with moisture-wicking, quick-drying fabric and thumbholes.
(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 white synthetic base layer crewneck with moisture-wicking, pill-resistant fabric, quick-drying comfort and thumbhole cuffs.
(127)
$54.95 $54.95
SALE
What customers like:
Great fit
Smooth fabric
Softness
Dino style
Material
$54.95 $54.95
SALE
Women's L.L.Bean Heavyweight Base Layer Crew Top, Print
L.L.Bean Women's L.L.Bean Heavyweight Base Layer Crew Top, Print
A blue heavyweight recycled-polyester base layer crew top with moisture-wicking, quick-drying fabric and thumb holes.
(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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