32 L (8.45 gallon) total storage capacity. Double Zippers Expand Bag From 17" Long to 20". Made from 1680 D ballistic nylon & water resistant polyurethane fabric. High vis orange 900 D Polyester interior. Hidden zipper compartment for rain cover and backpack straps. Four provided straps allow for wide range of mounting to any motorcycle; Can also be worn as a backpack. Sewn on straps on the back of the bag for mounting to Sissybars. Straps with side release buckles on the top of the bag allow for additional mounting of goods. YKK zippers. Additional mounting strap is available- part # 3550-0416. For direct attachment to Essential Saddlebags (Part# 3501-1960) and Escape (part# 3501-1961) use Thrashin Molle Strap Kit (part# 3550-0416); For direct attachment to Expedition Saddlebags (part# 3501-1963) no strap kit needed..