HYCOPROT Men's Thermal Underwear Bottom is made of 90% polyester 10% spandex with a fine fibre wool interior that locks in heat 360°. Soft and comfortable against the skin, keeping you warm all day long. Men's thermal set made of breathable fine fibre. With 65% wicking rate, it absorbs sweat and prevents odour, keeps you dry and drives away odour, so you can fully engage in outdoor sports. Our thermal top and bottom are made of four-way high elasticity material, four-needle and six-thread design, keeping super elasticity without being torn, any movement, providing enough support, increasing blood circulation, avoiding muscle aches and pains, and enjoying the freedom of movement. This cold weather gear, round neck fashion design, can be used as a warm bottom, can also be used as pyjamas, but also can be used as a suit bottom shirt. Extreme warmth makes it warm and comfortable to go out running, riding, hiking, hunting, skiing in the cold winter. This men's baselayer suit is a gift every man would like to get. Fleece lined, light weight, excellent windproof and warmth protection. Lock in heat quickly when you wear it. Give your father, lover, son comfort and warmth when it's cold.