8% Spandex Premium fabric made of 92% polyester and 8% spandex, our thermal underwear set features a super soft fleece lining that is not only super soft and comfortable, but also keeps you warm in the frigid air and prevents you from shivering. The ultra-stretch men's thermal underwear is flexible and fits perfectly, showing your figure perfectly, allowing you to wear more clothes in winter without looking bulky and guaranteeing freedom of movement. It will not deform after wearing it for a long time. Ideal sports gear Unlike regular underwear, our heated underwear set can be used not only as a base, but also as a sports suit because of its breathable and moisture-wicking fabric. It is ideal for running, climbing and camping training, cycling, hiking, jogging, indoor gym workouts, cold weather fitness body training. Set includes 1 x Men's Thermal Top + 1 x Men's Thermal Top, great for a base layer, so you can wear less but keep warm, looking good and comfortable in cold climates or inclement weather. Heartwarming Gifts Our men's thermal clothing, lightweight base layer, is beautifully cut and has a perfectly designed hem for easy on and off. You can give it to your boyfriend, brother, friend, father and husband as a heartwarming gift to make your loved ones feel the warmth of love.