Created for the GSP 300 Series and GSP 370 headsets, extensive research into the ergonomics of the human ear provide the highest quality of sound and comfort possible. The GSA 301 delivers the fit and comfort regardless if you play for just one hour or for an eight-hour marathon session.The Features of EPOS | Sennheiser GSA 301 Ear Pads at a Glance:Cooling gel-layered ear padsDual material for comfort and durabilityEar-shaped for best sound isolation and fitCompatible with EPOS GSP 300 Series and GSP 370Customized fit, comfortable experienceMemory foam for customized fit: Soft comfortable memory foam molds to the ear in response to warmth and pressure for a custom fit.Closed acoustic, over-ear ear pad: A closed acoustic, over-the-ear design delivers the best in passive noise attenuation and comfort.Passive noise cancellation: Thick foam, the superb acoustic seal and the closed acoustic design keeps distracting environmental noise to a minimum.Compatible with: The GSA 301 ear pads are compatible with the GSP 300 Series and GSP 370.EPOS | Sennheiser GSA 301 Ear Pads Specifications:Quantity1 pairCompatible BrandSennheiserSizeOne sizeCompatible Model(s)GSP 300GSP 301GSP 350