• 95% Bamboo Rayon, 5% Spandex. 
• Bamboo Rayon Breathable Undershirts: Made from Bamboo Rayon-a kind of cellulose fiber extracted from bamboo. It is featured with good air permeability, instant moisture-wicking, and lightweight, and stable dyeing property. The bamboo rayon undershirts.
• Smooth Soft: High-end Bamboo Rayon fabric, to bring you ultra comfort and softness, more breathable and lightweight than cotton undershirts.
• Well-Fitted: Bamboo stretch fabric spandex undershirts with elasticity for better fitting, no constriction for daily wearing.
• Versatile Performance: With breathable bamboo rayon fabric, this men slim fit undershirt is perfect as workout shirts, dress shirt undershirt. And it also good to wear as casual tees.