Material: Outer: High quality Durable water resistant eco-friendly Polyester fabric; Inner: Polyester lining. It offers high and long lasting performance and minimal weight. Fashion design & Vivid Printing, eye-catching and impressive, bring a good mood to kids to back to school. Combined purchase are more favorable. Dimensions:Backpack Approx dimensions: backpack: 11.8"L*15.7"H*6.2"W lunch bag size: 7.8"Lx9.4"Hx3.1"W Pen case size: 9"Lx4.3"Hx2.7"W Adjustable Shoulder Straps: You can adjust the length of the shoulder straps to suit your ideal comfort. Storage: Perfect for your laptop, charger, books, clothes, snacks, wallet, pencil case, bag, textbook, notebook, etc Material: 300D Oxford cloth Material description: Textured Oxford cloth is preferred, with a comfortable touch, good gloss, easy care, clear texture, fine luster, and strong sense of design lines. Upper body effect: a backpack that makes your travel easier and more fashionable. It integrates leisure, comfort and multi-function, and this bag is also waterproof, scratch-resistant and wear-resistant, releasing a slow fashion atmosphere. Function description: layered storage, layered division makes storage more convenient Special note: due to different measurement methods, this size data is normal, and the error is within 2-4cm Applicable people/scenes: school, travel, hiking, training courses, shopping, zoo, park, outdoor sports, etc., unisex. It is also a perfect gift for kids and friends.