The RaceQuip 360 Degree Helmet Support Neck Collar is made of high-density flame retardant foam which is covered with a woven FRC fabric. Used in auto racing to hold the helmet up off the driver's shoulders and provide a cushion between the helmet and shoulder blades or chest. Built just like our other fire retardant helmet support neck collars, except with no SFI tag. The round tapered wedge design measures 1 3/4" tall in the front and 2 1/4" tall in the rear. The Velcro® closure allows a maximum neck size of about 20" so the RaceQuip Helmet Support Collars are comfortable and easy to use. Available in one adult size in black, red, and blue.