Paradox Men's Performance Zip-Up Long Sleeve Base Layer Features 1/4" front zipper and zipper cover to hold zipper in place Structured material made with 92% Polyester and 8% Spandex Patented Dri-Release and Anit- Odor wicking material for high intensity workouts Stretch, lightweight top provides comfortable warmth without the itchiness fleece like lining is perfect for all outdoor activities in the winter cold!