What separates this suit from all the other SFI-20 Suits? The Sparco exclusive one of a kind X-Light fabric that is only available to Sparco combined with a new development of lightweight inner layers makes this suit the lightest -20 suit on the market.. The X-Light suit also offers excellent breathability, comfort, and style while at the same time exceeding the harsh flame protection standards of a SFI-20 spec. The fully gusseted sleeve design offers unlimited mobility within your shoulders and arms. The pants feature a stylish boot cut design with internal pockets, internal cuffs and an expandable waist. For built in arms restraints it is $50.00 more part number 1210-0046A. BE AWARE OF THE RULES, most -20 class requirements also need SFI Shoes and SFI Gloves, please let us know what size shoe you are and what size wind glove you would need and we can provide those also. RBS Superchargers sells SFI-15 also for $1,775.00. This fire suit is special order and could take up to a few days to get.