TAC Force WebTac Utility Backpack Nylon/Polyster Imported 900 Denier material, treated with DuPont Teflon for maximum protection from staining and harsh environments Protective treatment process surrounds each fiber with protection while allowing air flow for the fibers to breath freely permitting unrestricted product movement Top loading design main compartments Padded shoulder straps with metal D-rings High density closed cell foam back panel with air channels