Dry Gear Waterproof Backpacks are weather wonders. They keep your gear accessible and 100% dry during whatever it is you do. The Dry Gear Backpacks have a three-way sealing system. The Dry Gear back air cushion back support system, and is a complete welded constructed pack. All Dry Gear Bags are constructed of Tarpaulin which is highly durable and can take a lot of abuse. Dry Gear Packs that have exterior elastic rip-cord webbing allows for wet material to drip dry and stay out of your Dry Gear. Mesh water bottle side pocket, and reflective material are just a few small details with a enormous impact when you are out doing what you do.