These Circuit and slightly larger Circuit II competition seats are built using lightweight and super strong carbon fibre shells. Not only do they offer increased safety and protection compared to the standard 'QRT ' versions, they are also around 10% lighter.Carbon fibre shells provide increased strength and impact protection with reduced weightBuilt in head protection for vastly improved safety in side impactsNon slip material in strategic areas reduce body movement for better comfort and safetyAvailable in standard size (Circuit) and large size (Circuit II) to accommodate a wider range of driversThe Sparco Circuit and Circuit II seats feature integral head protection which provides much improved safety in side impacts. Deep side bolsters with a low profile base cushion offers increased lateral support while keeping the legs within the shell for protection. Non slip fabric is used on the base cushion and on the shoulders to increase body retention.Suitable for use with all FHR / HANS