WATERFLY Packable Hiking Backpack Smart Daypack for Traveling Camping Outdoor Sports Lightweight Multi-Function Design 3 in 1 Multi-Functional Bag: With buckles on the shoulder strap heads, one of the shoulder straps can be removed easily and used to be a fanny pack, while this backpack can be changed into a sling bag. Backpack, sling bag and waist bag 3 in 1, suitable to daily use. Ideal fordaily use, trips, vacation, travel, day hikes, school, camping and shopping, great gift Large Capacity Bag: Designed with multiple compartments for different kinds of items, the 32-liter large capacity sling bag has a main pouch with inner zipper pocket for valuables, 2 front zipper pockets for frequently-used items and 2 mesh side pockets for water bottle and umbrella. Foldable Backpack: Made of soft nylon material durable strong, backpack can be folded into the inner zipper pocket while it is empty, extremely space-saving and portable for outdoors Extra Backpack: Detachable shoulder strap is also an extra waist bag, interior design has small pocked with zipper and compartment for key hook, you can have your iPhone X / 8Plus, keys, cash and all your personal belongs items kept organized, while breathable mesh backside with sponge pad is breathable and comfortable to wear Breathable & Durable: With wear resistant and water resistant nylon material, the foldable hiking backpack is durable for long-lasting use, while both shoulder straps have mesh surface and sponge padded, super breathable and comfortable to wear A True Space Saver: Smart Folding feature allows to traveling backpack a true space-saver. Perfectly avoid overweight baggage charges by simply unfolding it from your luggage and using it as a carry on for your excess baggage. While the front reflective strip makes you visible in the dark, effectively ensures your safety at night.