A025 Outdoor Messenger Shoulder Computer Bag Sports Cycling Waterproof Bag(Black)1. It can be shoulder, crossbody, portable, zipper, puller, durable 2. Optimal material, exquisite workmanship 3. Rotating hanging buckle, waterproof oxford cloth, foldable hook and loop fastener two in one handle, backpack hanging system, external auxiliary compartment design 4. There are D shaped external devices on the left and right sides, which are used for shoulder strap connection, hanging pendants, etc. 5. There is an external hanging