PERFORMANCE. The T-Shirt is made of an innovative Polartec Delta cooling fabric system. Due to the special fiber structure and design, it helps the body to remain cool even in the hottest conditions. It has high breathability, great moisture-wicking properties and helps to prevent unpleasant odor. No matter how high the air temperature is - you will remain cool, dry, and fresh. COMFORTABLE FIT. Thought-out cut of the Punisher Delta T-Shirt is designed to flex and move with your body. Lightweight 4-way stretchable fabric supports your every move and prevents any chafing. Flat seams do not cause rubbing or irritation and do not create additional pressure when you are using backpack, sports bag, climbing gear or any other type of equipment. GENUINE POLARTEC. At 281Z we use only genuine Polartec fabrics for our performance products. Polartec's expertise in performance fabrics is unprecedented and we are eager to implement it into our products. Polartec fabrics bring us the confidence that the design of every 281Z garment will work as intended.