The Phoenix Extreme 35L Backpack is the perfect medium sized bag for big adventures. Designed with ripstop polyester, with a waterproof rain cover included, the backpack is durable, hydro compatible and has multiple pockets for convenient storage.Rip Stop Fabric - Stop rips in their tracks with this heavy duty fabric Hydration Compatible - a compartment specifically for a hydration pack. A hydration bladder is not included Rain Cover - Found in a concealed pocket usually at the bottom, the rain cover folds out to protect your rucksack from the rain Chest/Sternum Strap - Offers support for your back by helping to distribute weight and balance your pack Security Pocket - Zipped pocket for your valuables Lots Of Pockets - Multiple pockets to keep valuables safe