allbirds Women's Sea Tee Classic Designed to help keep you cool and comfy, our Sea Tea helps wick sweat and reduce odor thanks to a unique natural blend of eucalyptus tree fiber, ZQ Merino wool and chitosan (an odor-reducing fiber responsibly extracted from snow crab shells Fit: Classic fit, Crewneck 65% TENCEL™ Lyocell, 30% ZQ Merino wool, and 5% Chitosan. Its trim is made of 63% TENCEL™ Lyocell, 29% ZQ Merino wool, 5% Chitosan, 3% Spandex.