10 Best Long Underwear For Women 2026 in the United States

The wirarpa Women's Cotton Boy Shorts offer a comfortable and practical option for women looking for long underwear that prevents chafing and stays in place. Made from a soft blend of 95% combed cotton and 5% spandex, these shorts are lightweight and have medium stretch, allowing for good freedom of movement without feeling too tight or loose. The 8-inch inseam is long enough to protect your thighs from rubbing, which is great for activities like running, yoga, or even everyday wear under dresses or skirts. A wider, softer waistband helps keep the shorts from rolling down or digging in, adding to comfort. The fabric is breathable and wicks moisture reasonably well, helping to keep you dry during workouts or warm weather, although it may not be as quick-drying as synthetic materials. The gusseted crotch enhances ease of movement and comfort.

Seams are designed to reduce chafing, but some users might prefer flatlock seams for even less irritation. Odor resistance isn't specifically highlighted, so this might not be the best choice if you need extra odor control for intense exercise. The fit is labeled as regular with a neutral size sentiment, meaning it should fit true to size but individual preferences may vary. Machine washability makes care simple. This 4-pack with multiple color options offers good value.

If you want soft, breathable long underwear that focuses on comfort and anti-chafing for light to moderate activity, the wirarpa boy shorts are a solid pick. For those needing advanced moisture-wicking or odor resistance for high-intensity sports, other fabrics might be more suitable.

The Cuddl Duds Women's Heavyweight Fleece 2-Piece Thermal Set is a solid choice for anyone needing warm, comfortable long underwear for cold weather. Made from a blend of 93% polyester and 7% spandex, the fabric offers medium stretch, allowing you to move easily without feeling restricted. Its heavyweight rating (235 GSM) and fleece-lined interior mean it holds in heat well, making it especially suitable for chilly days. The soft brushed fleece inside provides cozy comfort against the skin, while the smooth outer layer resists pilling and feels nice to touch.

This set also features moisture-wicking and breathable technology, helping to keep you dry by moving sweat away from your body. Plus, it includes handy details like thumbholes to lock in warmth and a modern-rise waistband that fits snugly without pinching. The fit is athletic and true to size, which should suit most body shapes comfortably. The seams and overall construction are designed for durability and irritation-free wear (the tags are removed for comfort).

Machine washable and easy to care for, this set works well as a base layer under winter clothes or for lounging at home. Its camouflage design in black adds a stylish touch that’s a bit different from plain basics. If you’re looking for long underwear that balances warmth, comfort, and flexibility in cold weather, this Cuddl Duds set is a dependable option.

The Cuddl Duds Women's Heavyweight Fleece 2 Piece Thermal Set is designed to keep you warm during cold weather with its heavyweight 235 GSM fabric and soft fleece lining that retains heat comfortably. The set includes a snug-fitting long sleeve shirt and leggings made from a polyester-spandex blend, offering medium stretch for ease of movement without feeling bulky. Its modern rise waistband and thumbholes add to the comfort and help lock in warmth while providing a flattering fit. The fabric effectively wicks moisture and breathes well, helping to keep you dry through activities or everyday wear. Plus, it offers odor resistance and 50+ SPF protection, which are thoughtful bonuses for outdoor use. The seams are smooth and the tag-free design reduces irritation, making it suitable for extended wear.

Because the fit is snug and the material is heavyweight, it might feel a bit warm or tight for lounging in milder indoor conditions or for those preferring a looser fit. Also, being mostly synthetic polyester, it may not appeal to users looking for natural fibers. This set serves as a solid choice for women needing reliable, warm base layers for winter outdoor activities or layering under clothes, especially if softness and moisture control in a cold climate are priorities.