These men's thermal underwear bottoms are made of 20% nylon and 80% spandex, comfortable, breathable, warm and flexible fabric gives you a cozy experience. Men's compression pants are 4-way stretchy and tight fitting, wrapping your legs in all directions but without compression, giving you a natural wrapped comfort feeling. The long johns sexy open front design reduces the feeling of pressure and stuffiness on the private parts, brings men a light and comfortable feeling, and is also more convenient for men. Men's open front underwears are designed without tags, elastic waistband, open front, bright lines embellishment, and the use of clashing colors is very fashionable. These men's long johns are suitable for all occasions. It can be used as warm pants in fall and winter, or as bottoms for basketball, yoga, cycling and other sports, very versatile and convenient.