Alter the fit on your berghaus remote 12 daysack thanks to the adjustable chest strap and removable waist strap so it will feel secure and comfortable on your back features vented back panel keeps your back cool and comfortable and prevents any sweating height adjustable chest strap for a more secure fit detachable waist strap for a versatile fit hydration compatible h20 reservoir compatibility keeps you hydrated outdoors external side pockets ideal for a water bottle and other ea