Medium training backpack HilltopPitbull West Coast Medium Training Backpack HILLTOP fold out construction made of thick, durable synthetic fabric resistant to abrasions and damage when unfolded, it can be carried over the shoulder using the included strap adjustable soft shoulder straps can be hidden in a special compartment two large main compartments integrated sunglasses case additional inner zip pocket with mesh for small items ventilated bottom compartment for shoes or post