Wellzher Men's Bamboo Organic Cotton Polo Shirt (Tailored/Custom fit) (US M(Asian L), White) 70% bamboo rayon/30% organic cotton Imported Comfort: Softer than regular cotton. Fit type: Custom fit/Tailored Antibacterial: Bamboo fabric contains a naturally occurring antimicrobial agent called kun that prevents bacteria from cultivating on it. As a result, it helps keep you odor free. UV Protection: Naturally provides added protection against the suns harmful UV rays. Thermal Regulating: Helps keep you warm in the winter and cool in the summer. Its cooler than cotton fabric. Hypoallergenic: Natural bamboo does not cause allergic reactions. Stitches: 12 stitches per inch.