Simply designed and soft to the touch, the Sea Long Sleeve Tee uses revolutionary natural materials to keep you feeling fresh all day, any day. Made in Peru. The Sea Long Sleeve Tee is made of 65% TENCEL™ Lyocell, 30% merino wool, and 5% Chitosan. Its trim is made of 63% TENCEL™ Lyocell, 29% merino wool, 5% Chitosan, 3% Spandex.