Wolfman Beta Plus Rear Bag Wolfman describes them as a duffel bag with legs -- a simple way to add capacity without requiring side racks. Beta Bags hug the bike via the seat channel, yet stay clear of the exhaust (on most bikes). The bags solidly mount by three quick release straps, one around the rear of the bike, the front each to a passenger peg/bracket or sub-frame. A full access Crescent top zipper opening for full access to the contents. Wolfman added Non-skid/non-scratch material to the bottom (the same material they use on their Tank & Tail Bags.) Silver interior accents for better interior visibility plus new and improved raincovers. Wolfman kept the ever so useful side pockets, carry handle, duffel mounts and the 4 outside compression straps, and the ultra-durable Ballistic Fabric Body. Dimensions: Seat Overhang: 5 Overall Width: 29 Height (from top of seat): 9 1/2 Length: 11 Seat Channel Opening - Top: 10 Seat Channel Opening - Bottom: 14 Capacity: 45 Liters, 2750 cu.in. Note: Additional contents and stuff sacks pictured sold separately.