Vycah Pyrex Extreme Shirt - 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. Just like the Pant, the Pyrex Extreme shirt is in a class of its own in a durable, well cut upper body base layer. The same proprietary GRIDtech 4 way stretch fabric works as a second skin, providing additional warmth without weight and