👉 100% Cotton‼️ 👉 Sea-Island cotton is a type of natural plant fiber. Its fibers are very thin‼️ 👉 When the temperature is high, the fiber will relax to achieve air permeability‼️ 👉 When the temperature is low, it will tighten and warm up‼️ 👉 It has good touch, good breathability and sweat absorption‼️