10 Best Base Layer Women Cold Weather 2025 in the United States

The Thermajane Long Johns Thermal Underwear for Women offers a well-rounded solution for cold-weather layering. Made from a blend of 92% polyester and 8% spandex, the material promises flexibility and a snug fit. The fleece lining adds an extra touch of softness, enhancing comfort against the skin. This makes it an excellent choice for those who value comfort and warmth.

Additionally, the moisture-wicking property is a significant benefit, ensuring you stay dry even during active moments. The odor resistance feature also means you can feel confident wearing it throughout the day without worrying about unwanted smells.

This thermal set is ideal for women seeking a balance of warmth, comfort, and practicality in their base layers for cold weather.

The Cuddl Duds Thermal Underwear set for women is designed to provide warmth and comfort during cold weather. The material, made with 93% polyester and 7% spandex, offers a good balance between warmth and flexibility. The fleece lining ensures the set is cozy, while the spandex stretch allows for ease of movement—a necessity if you're active outdoors. Additionally, the material's moisture-wicking properties help keep you dry by absorbing and evaporating sweat, which is crucial for maintaining body heat during cold conditions.

A significant strength is the UV protection feature, offering 50+ protection, which is beneficial if you're wearing it as an outer layer on sunny winter days. The design includes a thumbhole sleeve top and modern rise leggings, making it stylish enough to wear on its own for casual outings, as well as a functional base layer. The set's capability to be machine washed adds convenience to its care routine.

This thermal set is ideal for those who prioritize warmth, functionality, and style in cold weather, and it serves well as either a base layer or standalone piece.

The WEERTI Thermal Underwear for Women is designed as a cozy and flexible base layer for cold weather. Made from a blend of 92% soft polyester and 8% spandex with a fleece lining, it offers warmth without feeling heavy. The fleece inside adds extra insulation, which helps trap your body heat to keep you comfortable during chilly days. The fabric features strong moisture-wicking abilities, pulling sweat away quickly so you stay dry rather than damp, which is important for both comfort and warmth.

Its four-way stretch fit hugs your body snugly without restricting movement, making it easy to wear under other clothing or even as pajamas. The slim, tailored fit reduces bunching and heat loss while being gentle on the skin, minimizing irritation. This thermal set works best for women looking for a lightweight but warm base layer to wear under casual or formal clothes in cold climates.