NRS Quick-Change Mesh Duffel Bag 600-denier polyester fabric with a mesh top The bag is the NRS Large Purest Duffel Sturdy 600-denier urethane coated polyester fabric forms the bottom and ends Heavy-duty mesh in the top allows moisture and odors to leave We've backed all the handle stress points with webbing on the inside of the bag so they can't pull out A removable shoulder strap is included