mesh,Imported,【Heavy Duty Mesh Backpack】Reinforced stitching and dual front pockets make this mesh backpack versatile, and we've cross-stitched all the joints to prevent breakage. It is sturdy enough to hold heavy stuff.,【Large Capacity】There is an oversized main compartment(17x12.5x8") . The upper front pocket(5.3*9.5") can put keys, rechargeable batteries and headphones, etc., the lower front pocket(8*10.5") is enough to put down a 9.7-inch IPAD.,【Comfortable and Lightweight】The back and shoulder straps of the mesh book bag are padded for comfort, and the straps are adjustable so you can make adjustments to fit their body type. The design is ergonomic to better distribute the pressure on your shoulders.,【Applicable Occasions】Multi-used and large capacity, apply for any occassions. Such as go hiking, camping, sports, casual daily wear, travel and storage.,【Sports Mesh Backpack】 thick mesh but it's still lightweight, holding up for hiking, shopping, etc. Bottom one is big enough and there is cushioning on the straps of the bag for comfort.