Zipper closure Thick and durable TPU: The transparent backpack is made of odorless thick TPU,it is durable, soft, and more environmentally friendly. which is vastly superior to PVC, TPU for longer service life,which is very suitable for daily use. Multi-functional compartments:1 large main compartment for binders, laptops, books,shoes, etc., with 1 small inside mesh pocket to fit you phone, cards, etc., 1 front compartment for pencil cases, glasses, etc, 2 side mesh pouches to hold water bottles or folding umbrellas,The clear backpack affords decent room for different purposes. Reinforced Padded Straps - Reinforced strap stitches are adopted to fix the strap firmly; Soft-padded straps provide you with comfortable wearing experience; Length of the strap can be adjusted from 16" to 31". Perfect Size - LWH: 14 x 5.7 x 17.2 inch, this clear backpack is large enough to hold everything you need like heavy books, pencil cases, water bottle and other work or school items; the laptop pouch fits laptop size up to 15 inch.