breathable and mildly stretchy. Very good used condition. The Prana prevailor tank for men is made with a blend of sustainable Hemp and recycled poly. Design features include moisture-wicking properties, natural odor-reducing features, strategically placed seams for easy movement and low abrasion, and a standard fit. 95% Polyester, 5% Hemp Recycled polyester/Hemp blend short sleeve tank Moisture wicking Quick Dry Natural odor reducing features Strategically placed seams for movement and low abrasion Cheers!