Undershirt always so comfortable whatever you relax at home or sleep in bed. 1x1 rib crew neck which have nice stretchy and good for you to wear. Organic cotton fabric always give you great experience of breathable, soft,comfortable and eco-friendly which have no any harmful substances from plantation, dyeing, sewing and packaging. Men's Organic Cotton Undershirts-Product Details Body 100%organic cotton Crew neck 100% organic cotton 1x1 rib Color White, black, navy,grey melange, any customized colors you want.