wholesale stylish custom computer travel storage backpack durable waterproof student backpack for school, business, laptop

thickened shoulder straps can relieve back pressure, making it more lightweight and breathable. customized metal zipper pull heads are durable and not easily damaged. adjustable shoulder straps allow for flexible adjustment of shoulder strap length, making it more user-friendly super large capacity, multi-functional partition independent bag, storage is more neat and orderly, bid farewell to clutter, and can easily accommodate books not limited to ipad, mobile phone, lap magazine, clothing, wallet, umbrella, water cup, camera, power bank. not only can it be worn, but it is also easier and more comfortable to carry. it conforms to ergonomic customized straps and fits the shape of the shoulders the fabric is waterproof, with a comfortable, natural and simple feel. the texture is comfortable, sturdy, wear-resistant, resistant to dirt and easy to handle, and has high tear resistance. the zoning is reasonable.syi