[Good waterproof material]Made of thick PVC net clamping cloth , provides the best waterproof performance to protect your valuables from water and dust . Durable , solid and easy to clean [New design of the bag seal]Closure by roll-up and buckles without zipper to prevent water or rain from entering the bag , also it's easy to rub it dry . Excellent air-tightness and safe to storage belongings [Excellent waterproof & air-proof]Adopted High frequency welding technology to make bag edges could be sealed well , fine workmanship and durability [ & adjustable volume]Storage space (20L) is free accroding to your belongings , easy to install and 't be a burden when riding [Excellent design and safe ]Reflective stickers around the bag , give you a at night . Good gift and stuff and your friends Colour:Black Material:PVC Size:37x26x13CM Package Contents: 1 x Bicycle Pannier Only the above package content, other products are not included. Note: Light reflection 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.