Hydration backpack backpack capacity 3 liter pack volume 2 litre application cycling model 2015 materials 210 d ripstop nylon 600 d polyester 3d mesh air mesh suitable for men women chest straps with chest strap adjustable hip belts with waist strap adjustable detachable additional fastenings rear light loop carry handle top back panel pods 1 outside pockets front pocket internal pockets mobile phone pocket glasses pocket key clip hydration bladde