It couldn't be more comfortable. The high-stretch fabric follows your movements and lets you enjoy your activity without hindrance. Soft knit with a clean finish that won't fluff, fray or snagSweat-wicking, quick-drying fabricStretch and flexibility for greater freedom of movementRibbed collar and cuffs for added stretch and comfortThumb loops to help hold sleeves in place and opening on left wrist for quick and easy access to ta watchEnvelope pocket on right side