Large panel loading main compartment provides accessibility to inside contents Dual stretch mesh side pockets provide additional storage options The multi-function interior sleeve can be used for either a hydration reservoir or tablet Mesh-covered die-cut foam back panel provides both comfort and ventilation. Front zippered pocket with mesh organizer and key clip Total volume: 13L - Compatible as an attachment to several Osprey travel and backpacking bags for additional storage and carry options Dimensions: 16.93 x 10.24 x 7.87 Inch