Zefal 3-Liter Hydro Bladder: * 3-liter capacity (101.44 oz) * 2 larger zippered main compartments * 3 external pockets * 2-way adjustable sternum strap * Adjustable waist strap * Hydration bladder sleeve * Ballistic nylon material * BPA-free PEVA material bladder * High-flow bite valve mouthpiece * Mouthpiece shut-off valve * Incorporated bite valve cover * Insulated hose covering