When you've got a lot to carry, this backpack helps you manage the load. The medium-size backpack has ergonomic shoulder straps made of breathable mesh for comfort. The 3-Stripes down the front make it adidas, and the TPE-coated base is durable and water resistant. A medium-size backpack with ventilated shoulder straps. Zip main compartment; Front zip pocket.Side mesh slip-in pockets for bottle storage. Top carry handle; Adjustable side compression straps. Adjustable ergonomic air mesh shoulder straps for breathable comfort