Drop-bottom compartment has a divider panel between upper and lower compartment that opens to make one compartment Removable roll-out mat is stored in a zippered compartment great for working out, changing shoes or sitting in wet grass. PVC coating makes it easy to keep clean Hidden backpack straps, with Vapel?mesh padding, are stored behind bottom panel Water bottle pocket and monster hook on end Two zippered, easy-clean PVC-lined wet end compartments roll up when not in use one end has ventilation grommets Zippered front accessory pocket Elasticized mesh side pocket with hook/loop closure CD/MP3 player pocket with headphone port Tricot-lined sport goggles/sunglasses pocket Detachable/adjustable shoulder strap with Vapel?mesh padding and Suspension System Neoprene handle wrap wicks hand moistureVapel?mesh grab handle on each end Dimensions: 26x13x12.5in Volume: 3356cu in