Description Quick Fit and SFI 3.3 Approved! Durable knit Nomex sleeve covers a high density foam that contours and forms a support that's at home in nearly any race situation. Adjustable Speedfit fastener ensures a secure fit. Reduces Neck Fatigue for Any Racer Removable Knit Nomex Sleeve One Size with Adjustable Speedfit Fastener SFI 3.3 Rated, SFI Tag Included