WATERPROOF PROTECTION - This dry bag backpack provides 40 liters of completely airtight storage capacity and is ideal for any outdoor adventure where you need to protect your gear from water, snow, mud or dust. Whether commuting on a bike to work or rafting down the river rapids, your clothing, tools, electronics and camping gear will be safe. LOADED WITH EXTRA FUNCTION - The Hydric series boasts external splash proof pocket for items that you need to have quick access to and also an internal zipper pouch convenient for keys, cell phones, wallets, and other small items that you don't want to drop to the bottom of the pack. Also featured are two side mesh pockets on either side of the pack ideal for storing water bottles, snacks, gloves and any other small items that you want to keep secure. OUR STRAPS WON'T TEAR - All straps are sewn into patches that are welded to the pack and the patches are double the denier count of the actual backpack material which means you have straps that are unlikely to tear out of the pack. FLOATS WHEN DROPPED IN THE WATER - When sealed properly (folded tightly 3 times and then clipped upward) the Hydric series backpack will actually float when dropped in the water because the welded seams and roll top closure create an air-tight seal.