Light weight and technical, the Salomon Trail Runner II Tech T-Shirt has mesh panels for improved ventilation and 2 gel pockets. Key Features of the Salomon Trail Runner II Tech T-Shirt: Smart Skin Acti Lite Ii Stretch Mesh Acti Lite Ii Polymockeylet Flatlock Seams Reflective Branding Front & Back 2 Gel Pockets Composition Insert: Polyester 91%, Elastane 9% Body : Polyester 92%, Elastane 8% Active Fit Weight 130 G / 4,59 Oz