The Team 365 TT11L Mens Zone Performance Long-Sleeves T-shirt Team 365 Mens Performance Long Sleeves T-shirt fabrics 1005 polyester interlock with 3.8 oz. light in weight and comfortable to wear all day. It features moisture-wicking and UV protection. It has a heat sealed label which provides you tag-free comfort. Fabric: 100% polyester 3.8 oz.; yd2; 130 gsm Interlock with moister-wicking Athletic fit;