Hydration backpack backpack capacity 9 liter pack volume 2 litre application cycling model 2015 materials polyamide polyester polyurethane suitable for women men chest straps with chest strap adjustable hip belts with waist strap with pockets adjustable additional fastenings helmet holder safety light loop carry handle top back cushions adjustable mesh back outside pockets side pocket front pocket base compartment internal pockets hydration bladde