Durable polyester fabric make this pannier a long lasting touring companion. The waterproof roll closure ensures safe and waterproof storage of food and equipment. With its QL2.1 fixing it is quickly mounted and taken off the bike rack. A shoulder strap provides carrying comfort when taken off the rack. , keep your goods dry and protected on your rear rack in the waterproof Ortlieb Back-Roller Classic Bike Panniers. Coated polyester fabric offers waterproof toughness; roll-top closure seals out water 40-liter gear capacity (20 liters each) can carry food, extra layers, toiletries and other essentials QL2.1 mounting system fits racks up to 16mm in tube diameter, and includes adapter for 8 and 10mm Inner pocket; large reflectors; shoulder carrying strap Ortlieb Back-Roller Classic Bike Panniers come as a pair 3M Scotchlite reflectors | integrated inner pocket Specs Gear Capacity (Liters): 40 Liters per pair / 2,441 cubic inches per pair height:weight and capacity of a pair of bags 16.5 in upper width: 12.6 in bottom width: 9.1 in depth: 6.7 in weight: 67 oz volume: 2441 in^3 fabric: PD620/PS490