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 Underwear is a strong choice for anyone needing a warm base layer during cold weather. Made mostly from polyester with a bit of spandex, it offers a soft fleece interior that helps trap heat while feeling very comfortable next to the skin. Weighing 235 GSM, this set is heavier and warmer than typical lightweight options, making it ideal for winter days or chilly outdoor activities.

Fit-wise, it runs true to size with a snug, modern cut that moves well thanks to medium stretch material. The crew neck and long sleeves with thumbholes add to the warmth and make layering easy. The seams are designed to avoid irritation, and the tag-free construction enhances comfort for extended wear. This set stands out for its moisture-wicking and breathability features, which help keep sweat away and prevent dampness, critical for staying warm and dry. It also offers good odor resistance, so you can wear it for longer periods without discomfort. The thermal fabric includes SPF 50+ protection, a nice bonus if you plan to be outside in the sun.

Some might find the heavyweight fabric a bit bulky for indoor lounging or less cold conditions. Also, as a polyester blend, it may not appeal to those who prefer natural fibers like wool or cotton for thermal underwear. Machine washing is convenient but could reduce fabric softness over time. This Cuddl Duds set is a dependable and cozy base layer that works well for active or casual winter wear. Its warmth, moisture management, and thoughtful design features make it a practical option for women looking to stay comfortable in cold weather.

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.