Welded rather than sewn seams are the only way to make 100% waterproof
backpacks.We WELD the seams of 210D nylon airline life vest fabric to create waterproof liners for our packs and panniers.
.These liners are then sewn into our packs using the welded tabs.
By using waterproof liners on the inside, we can give you more cycling specific features for your pack on the outside, like blinker mounts,pockets, pocket attachment points, compression straps and u-lock holsters. These liners also contain large welded velcro panels to attach padded laptop
The Zip Side Pocket lets you securely store those easy access items. . It easily mounts to the side pocket attachment system on the side of every Velo Transit pack and the Metro 20 and Retro 20 panniers.
Margaretta Sangree from Cambridge, MA USA on Feb 17, 2013
Very well made, and very secure and still easy to put on /off as needed. Rather pricey, but they won't be wearing out any time soon (probably never!). I like using a pocket on one side, and a mesh bag on the other for my water bottle.