Petdog carrier backpack 1.Adjustable Straps for Owners 2.breathable nets for ventilation 3.Integrated hooks for attachment Petdog carrier ... discribe:Adjustable Straps for Owners of different sizes,Carrier has breathable nets for ventilation,Durable,Carry your pet on your back ... of Back: up to 12" | Neck: up to 19"Material:breathable nets,Nylon