THe Hot Chillys Chamois Panel Thermal Top is Hot Chillys best selling mens baselayer because of its warmth and softness Micro elite Chamois fabric feels really soft on skin and is very breathable so sweat wont build up Made with Spandex this thermal top fits close to the body Bio Silver yarns are anti microbial adding an element of freshness for ski trips without laundry access Micro Elite Chamois fabric is soft and breathable Bio Silver anti microbial treatment for extended freshness Spandex for a closer fit 30 UPV protection Best selling Hot Chillys baselayer