Light weight trail running backpack. Its only 195g and flexible, close-fitting. It has stable system which is horizontal adjustment brings better wrapping and stability on the back. Multi fabrice structure 1. Four-sided elastic fabric 2. Cordura fabric 3. Close-fitting breathable mesh. It can carry 2L water bladder. Side pocket to store clothes. Kangaroo pocket for the windbreaker jacket. Front shoulder strap can carry 2 x 500ml bottle, 6.8inch phones pocket, hiking pole holding strap. Size is references to chest circumference S/M 78-90cm / M/L 90-102cm / L/XL 102-115cm Weight: 195g Net: Polyester Fabric 1: 85% nylon, 15% spandex Fabric 2: nylon Applicable: run, cycling