HEAVY-DUTY TRANSPARENT BAG: Made of 0.6mm water resistant PVC plastic, which is thicker than 70% of transparent backpacks on the market. The fully transparent design allows items to be seen for convenience. checkpoints safety in schools or at work. EXTRA STRONG SEAMS: All seams are double stitched and the seams around the shoulder straps are reinforced. This transparent school backpack is reliable for carrying heavier loads, such as books and a computer portable. REINFORCED PADDED STRAPS: The shoulder straps are padded with thick cotton to reduce pressure when carrying heavier loads. The shoulder straps are adjustable from 16 to 31 and the maximum weight is 66 lbs. LARGE CAPACITY: Overall external size is 17x15x8. 1 large main compartment with laptop sleeve that can hold a laptop up to 15.6 cm, 1 front zipped pocket with mesh slots to store your phone, pens, keys, etc., 1 side zip pocket for frequently used items, 1 side stretch mesh pocket for large bottles or umbrella. LARGE CAPACITY: The outer suit size is 12.6 x 10.24 x 3.35 ''. 1 large main compartment for storing books, notebooks, clothes, 1 front zipped pocket with mesh slots for storing phone, pens, keys, etc., 2 pockets stretch mesh sides for large bottles or umbrellas.