Delune Kids Backpack Cute Schoolbag with Lovely Doll for Girls and Boys - Waterproof/Lightweight/Noble Professional Schoolbag for Kids - DELUNE Quality Material and Workmanship:600*600 High-density Polyester fiber with foam layer,exquisite workmanship,waterproof and durable. Human Engineering:U shape back cushions,give upward lift force to the parts under power of kids' spine,thick back cushion Air cushion,reduce stress. Large Capacity:Could put in lots of books and other things. Return Policy:Refundable for life.