100% Waterproof and lightweight - Weighs less than a pound. Roll Top with soft Padded Backpack straps. A Waterproof backpack dry bag is a must-have when you need a lightweight, portable, flexible, totally waterproof container to keep your personal gear dry. Our medium-sized 20 20-liter roll-top dry bag backpack is perfect for carrying all the essentials for day trips, travel, and outdoor activities. This dry bag backpack is designed for convenience and versatility, with two carrying options: backpack straps for easy transport and a D-ring attachment for securing the bag to a boat, kayak, paddleboard, or other gear. Ideal for carrying clothes, towels, electronics, small valuables, and more.