Worldwide shipping within 2 to 4 weeks. Nylon lining Zipper closure Hand Wash Only ?Durable Material? Nylon Fabric outside, Anti-scratch, Waterproof, Fine stitching, SBS smooth zippers. Polyester inside, quality of a material soft, anti-wrinkle, easy to clean. ?Perfect Size?: 33 * 18 * 40 cm , Adequate CAPACITY for childrens daily and school supplies, and the MULTI-POCKET design gives your children a habit of categorizing. ?Spine Protection?“S” shaped strap design, scientific weight-loss design. Breathable air cushioned back, Comfortable for the shoulders and back. Adjustable padded shoulder straps. Recommended age: kids 5 - 10 years old. ?Helpful Features? Reflective tape is available on both shoulder straps and side storage bags, It's easier to spot at night or in fog. Non-slip chest buckle shares the pressure on the back and shoulders. ?Factory Direct Sales? We have been focusing on the design, development and production of people's daily backpacks. Quality assurance for 12 MONTHS, any quality problem will be solved for you during the warranty period