The descendant of our first technical base layer created in 1984, ME Chamois has developed a reputation for being the most reliable, durable under layer made by our company. The secret to the success of these men's thermal tights lies in the fabric's intimate blend of enhanced polyester and spandex fibers. This piece of men's long underwear is engineered with exceptional stretch-ability in a polyester treated with Bio-Silver anti-microbial silver properties that inhibit the growth of odor-causing bacteria. The result is a highly technical, high-performing piece of thermal underwear that'll keep you warm for years to come. Order these Hot Chillys tights today! Covered elastic waistband for added comfort Gusset eases movement and reduces seam bulk (NO fly front) Moisture Transfer Fibers to wick away moisture 4-way stretch for unlimited movement UPF 30 protection Midweight warmth, body fit Inseam size medium: 29"