The Skid+ racing boots use similar design and attributes to the Sparco Skid boot, but the Skid+ has been developed with co-drivers and mechanics in mind. A thicker sole with increased cushioning provides greater comfort, especially when on your feet for periods of time. Complies with the latest FIA regulations for use in motorsports Ideal for co-drivers or mechanics where a flame retardant boot is required Thick cushioned sole provides comfort Calfskin leather construction with high abrasion resistant inserts offers a Excellent Protection The Sparco Skid+ racing boot is constructed with a perforated calfskin upper that is comfortable and allows the boot to breathe and helps regulate temperature and REDduce perspiration. High abrasion resistance patches are used in key areas to add protection. The rubber outsole features a chunky tread pattern to provide excellent stability and grip on many different terrains. FIA Approved 8856-2018