Thicker PVC material: Vorspack clear bookbags are made of smell-less thicker clear PVC material, which is sturdy enough for everyday use. And, the transparent backpack is both heavy duty and soft that you can fold it as you need, it would not crack even in cold weather. the clear bookbag has 1 large main compartment for books, with a secure zipper pocket for phone, and 1 front compartment with 4 mesh slots for pencil cases, and pens. Besides, the clear plastic backpack has 2 side mesh pockets for water bottles or umbrellas.