Whether buying bike panniers for commuting or touring, it is essential that they be waterproof, secure durable and versatile. Velo Transit panniers are all of these. Welded polyurethane coated nylon liners are integrated into our bags to make them 100% waterproof and our locking Klickfix hardware ensures that they stay in place and Never fall off. We use 1000 Dennier textured nylon and 500 Dennier nylon Cordura on the exterior bags for superior long lasting durability. More abrasion resistant and more environmentally friendly this material will long outlast PVC. By using waterproof liner, we can incorporate more features into the panniers such as compression straps, integrated pockets and accessory mounting points for side and front pockets. These accessory pockets let you customise your bag to your needs. Please have a look at our Velo Transit waterproof panniers and feel free to call or email any questions you have as we are always happy to help.