Vycah Pyrex Extreme Pant - Black/GrayWithout a good base layer, the rest of your outfit isnt able to function as designed. As the first barrier between your skin and the elements; its critical a good baselayer be warm, comfortable, and moisture wicking. The Pyrex Extreme Pant has all those things in a durable, well cut package. The proprietary GRIDtech 4 way stretch fabric works as a second skin, providing additional warmth without weight and maximum breathability. Polyester Spandex