The special construction of Grid Tech fleece, which is thin and highly breathable, compressible in very small spaces thanks to its characteristic grid structure, promotes sweat evaporation and is an excellent thermal insulator, ideal during all outdoor activities even at high intensity.The sporty, refined design of this second layer makes it easy to wear even under a jacket.The two zippered side pockets provide storage space for useful items. Compare prices from: Cmp in Men's Clothing