10 Best Women's Thermal Undergarments 2025 in the United States

The Cuddl Duds Thermal Underwear for Women is designed to keep you warm during cold weather with its brushed fleece interior and soft exterior. The material, a blend of 93% Polyester and 7% Spandex, offers good stretch and a snug fit, making it comfortable for active wear. The heavyweight fabric ensures warmth without adding bulk, allowing for versatile wear either as a base layer or standalone piece.

The moisture-wicking feature is beneficial for maintaining dryness, while the UV protection adds an extra layer of safety for outdoor activities. The inclusion of thumbholes in the sleeves and a modern rise in the leggings enhance the fit and comfort further. However, some users might find the fit too snug if they prefer a looser wear. The seam construction is designed to reduce chafing, enhancing comfort.

With machine washable care instructions, maintaining this thermal set is straightforward. This product is best suited for those looking for reliable, stylish thermal wear that can be used for both outdoor activities and lounging at home.

The Thermajane Long Sleeve Thermal Shirts for Women offer several advantages as a base layer for cold weather. Made from a blend of 92% polyester and 8% spandex, they provide a soft and stretchable fit, which ensures comfort and flexibility. The fleece lining adds extra softness and warmth, making these shirts ideal for retaining body heat during cold days.

The moisture-wicking properties keep you dry and odor-free throughout the day, which is beneficial for various activities, whether at home or work. Additionally, the elastic closure type enhances the snug fit, preventing heat loss and adding to the comfort. The 4-way stretch fabric allows for free movement, which is a great feature for women who are active or on the go.

On the downside, since these thermal shirts are imported from China, some users may have concerns about the environmental impact or prefer locally made products. Nevertheless, with its excellent heat retention, softness, and moisture-wicking capabilities, the Thermajane thermal top is a solid choice for women seeking a reliable base layer in cold weather.