*Polyester lining *Zipper closure *Material: Made of durable and practical high quality Water resistant Polyester.Lovely and cute toddler backpacks, perfect for children going out for hiking, travel, and daycare center. *Suitable size  (Can't fit A4 book) ,easy taking book in and out for those low age kids * The main inner compartment of the backpack can put kids's books and other stuffs *The child-size backpack is perfect for toddlers going to preschool or play dates.The adjustable padded shoulder straps offer support and comfort while the adjustable chest strap stabilizes the load throughout the day's activities. * Warranty:The bags made based on very strict testing standard to make sure the dying material is no harm to our lovely kids . the fine-finishing and the round edge accessories such as plastic buckles , zipper puller ,woven badges.we pay great attention and sincerity to make sure the bags be your satisfication * NOT RISK AFTER -SALES ,Just contact us whenever you have problem with our bags ,we will responsible after getting your messages ,pls no worries ! *Special other service :We can customrized logo ,your kid name on the backpack even specially for one piece.Welcome to contact us ,waiting for you