Product details:

Watershed's Westwater Backpack is its largest waterproof backpack. This pack offers monstrous storage space and a completely watertight construction and top closure. Pack the Westwater to the brim, lash it to the deck of your raft, and submit it to a thrashing in the river. All your gear will stay dry day-after-day, and when it comes time to rock a long portage, the shoulder straps and waist-belt make it that much more comfortable to go the distance.