Materials - Appearance: nylon cloth,Inside: PVC, wear and tear resistant, and easy to scrub.Quick Attach and Remove - Saving time for people who go to work or school and everyday off-bike use. Adjustable design fits most bicycle racks.Safety - The reflective strips on the rear of the bike bag ensures night time visibility. It's convenient for short trips and long distance journeys.Large Capacity - Come with 2 large side pockets, each side has 15L storage, 30L capacity in total is enough for your daily commute or shopping loads.Easy to Install- Easy to install and remove. It is a good helper for cycling, camping and outing with friends and family.Specification:Colour:Blue+blackMaterial:Nylon cloth+PVCSize:49 x 29.5 x 30.5cmPackage Contents:1 * bike rear pannierOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.