La Sportiva Size Chart The Essentials T-Shirt is made from supple, 100% organic cotton that keeps you cool and protected. Classic climbing graphics, responsibly manufactured materials and a perfectly tailored fit combine to make the Essentials T-Shirt a great addition to any kit. Features: - 100% organic cotton for all-day comfort - 4.9 oz single jersey knit - Side insert (diagonal straight grain) for increased freedom of movement