SealLine Discovery View Dry Bag 30 Liter- CLEAR VIEWThanks to its transparent materials, it's easy to save time and energy by swiftly identifying contents in our waterproof Discovery View dry bag. The PurgeAir valve quickly vents trapped air for easy closing and packing, while the oval bottom helps keep the bag from rolling around, making the View a great option for any paddling trip. PurgeAir equipped: Our unique and waterproof PurgeAir valve vents trapped air, helping the dry bag compress further