Cell Phone Bag : The left shoulder strap of the hiking backpack is designed with a cell phone bag with zipper, and it can be removed, it is enough to hold 1 7-inch cell phone, the right shoulder strap is equipped with an elastic bag with drawstring, which can hold snacks and other hiking use, easy to take. One Size Fits All : Adjustable chest and waist straps snugly fit all body shapes. No more slipping or bouncing—just a secure, comfy fit that moves with you. Lightweight Small Backpack : This lightweight travel backpack weighs only 0.68 pounds but has a capacity of 15 liters, allows you to pack some essentials with you. Foldable Packable Daypack : Packs up super small. The folded size is only 7.48inch x 7.08inch. You can easily pack it in your suitcase or backpack. Multiple Function Back pack : This backpack carries all essential gears, water bottle, snacks and personal items during outdoor activities. Furthermore, it also handles running, biking, walking, camping, traveling, boating, hiking, day trips, amusement park, city explorations, weekend travels, airplane personal items or even as a casual daily backpack. Small Hiking Backpack with Detachable Front Phone Holder, Foldable Packable Back pack with Chest and Waist Strap, Lightweight Daypack for Women Men ( Black, 15L )