The Ortlieb Bike-Packer plus Rear Pannier is constructed of abrasion-resistant Cordura fabric, which makes this pannier the tough travel companion for extended bike touring. The waterproof three-dimensional front pouch offers additional storage room. Quick and easy mounting to the rack thanks to the Quick-Lock2 fixing.Rear pannier with optimized shape and additional waterproof front pocket. PS 36C PVC free fabric is made of Cordura and has a polyurethane coating. IP54 Water proofness and dust proofness: IP5x protects against dust, with a slight penetration of dust possible, IPx4 protects against splash water coming from all directions. Lid closure for optimal weather protection and ease of packing your gear. Quick Lock2 system for rack diameters up to 16mm is adjustable without any tools. (8 and 10 mm reduction inserts are included). Integrated inner pocket for increased storage. Large reflectors for added visibility and rider safety. Base feet to protect the bottom of the pannier when it's off the bike. Shoulder strap so you can take it with you on the go. Dust/snow gasket under the lit with cord to keep out the elements. Edge protection prevents contact with spokes and other abrasions. Capacity: 2441 cu in./ 40L Size(H x W x D): in cm: 42 x 23-32 x 17 in inches: 16.5 x 9-12.6 x 6.7 Weight: 73 oz./2070g for the pair.