100% WATERPROOF CONSTRUCTION: Dual Seam Technology (sewn for strength/welded waterproof) and urethane coated zipper with hook-&-loop-close flap provide protection against rain, snow, heat, heavy winds, and other extreme conditions. 1 YEAR MANUFACTURER'S WARRANTY: Shop confidently; our service team is based in the USA & skillfully trained to help you with any questions or concerns. ATTACHES WITH OR WITHOUT A ROOF RACK: Attach the carrier's straps to a vehicle’s roof rack LARGE CAPACITY DESIGN: 13 cubic feet of storage, 40” L x 20” W x 28” H; unique rear vehicle placement conserves fuel and gives you easy access to your gear. EASY TO INSTALL: Your bag comes with everything you need to load it up, attach it, and hit the road in minutes! Includes car back carrier, (2) bottom straps, (1) belt strap, bottom pole frame, and stuff sack with sewn-in set up guide.