Helikon Men's Tactical T-Shirt Black 100% Polyester, TopCool To fit chest (recommended): S 35"-38", M 37"-40", L 38"-41", XL 40"-43", XXL 42"-45", 3XL 44"-47" Made of thermo active Polyester with TopCool technology. Anatomic cut for comfortable fit Lightweight and highly breathable. Keeps you dry and cool throughout the day Two bicep pockets with Hook-and-loop panels for easy personalization Durable webbing loop on each pocket for glasses. Material: 100% Polyester, TopCool