Plenty of room for all you need for a long ride, including space for the included 1.5L hydration bladder. The main pocket folds out to make a trail-side tool bench to help keep track of parts and small pieces that could otherwise get lost in the dirt. Water resistant cell phone pocket keeps your phone dry and out of harms way. Single sided stretch belt adjustment, ripstop nylon 3D mesh backing stetch belt, amd waterproof zippers.