Features: 【Comfortable carrying】S-type decompression shoulder strap adopts thickened honeycomb sponge to promote air circulation, which is conducive to heat dissipation and evenly disperses the pressure on shoulders.Adjustable shoulder straps with a top handle for comfortable carrying options. 【Large storage space】Large storage space, reasonable storage, clear partition of items to improve learning efficiency, books, tablet computers, clothes, notepads, mobile phones, water cups and so on.For school, camping, college; the organization pocket and side pockets let you store various accessories. 【Double pull head design】Double pull head design using smooth zipper, pull smooth not easy card, with double pull head design, convenient and durable! This backpack has smooth surface. Cool design for stand out from other usual. 【High density waterproof fabric】High density waterproof fabric, don't worry about wet books in rainy days, durable and wear-resistant, feel fine.It is reinforcement processing shoulder strap connection, reinforcement processing, back again heavy things are not afraid, durable not easy to break! 【Adjust buckle design 】Adjust buckle design according to the need to adjust the length of the shoulder strap, anytime, anywhere, bear more comfortable!With size 31x16x46cm.With lock ensures safe storage of your belongings.It is usb charging design,convenient for your phone charging. Specifications: Material: Oxford Cloth Color: Grey,Black,Blue Size(about): 31x16x46cm/12.2x6.3x18.11inch(LxWxH) Package Included: 1pc x Computer Bag Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.