Features: Constructed of ultratough 40D ripstop nylon that is ultralight, but can handle adventurous use! Stuffs into its own side pocket, so that you don&';t have to keep track of a separate stuff sack! Weighs only 3.5 oz Hydration bladder compatible 16L main compartment Padded shoulder straps The Drifter 16L backpack is your best solution for when you don&';t want the extra weight of a full pack or luggage. The tough ripstop nylon material will hold up during your adventures and travels, giving you the option of leaving your heavier packs behind for daily excursions. Hydration bladder compatibility in the top of either shoulder strap gives you more customization for carrying water. Be comfortable and prepared with what you need for even day trips while still living ultralight. You&';ll never want to leave this little 3.5 oz backpack behind!