In the world of Front Head and Neck restraints, the SHR Evo is hard to beat. Don’t let the entry level price fool you. The Evo’s outstanding performance, lightweight body and included tether + helmet posts makes it one of the best values on the market. The thoughtful design incorporates a sliding tether for extended range of motion and fixed winglets keeps your harness secured into place. The SHR Evo is SFI rated and is available with a 20 degree angle (perfect for most saloon and rally cars). SFI 38.1 Certified 1.61 LBS weight 20 degree angle Includes device tether and and helmet twist anchors Sizing Guide: 15 to 18 Inches (38 cm - 47cm) - Size Medium (M) Over 18 Inches (> 46 cm) - Size Large (L) Large can also be worn with smaller neck sizes to move some load off of the collar bone for comfort. Click to Picture to Order!!!