The new generation Roy Benson bags with SPS system. The SPS-system (Side Protection System) used in all Roy Benson Prestige gig bags is a fiberglass inlay worked into the fabric of the bag, which provides superior overall protection to the instrument. Besides the highly compressed, 20mm high foam lining, the SPS-system guarantees perfect protection against shocks and other external hazards. The Roy Benson Prestige Gig Bags combine the protection of a case with the carrying comfort of a bag. Type: Musical Instrument Accessories