Meru Safety Racing Ascent Carbon Head & Neck Restraint with Quick Release Tethers & Shock Absorber Reduces Force from Frontal Impacts (Small Medium) Milwaukee This tool carrying case has a Nelson Rigg This tool carrying case has a shoulder strap A protective vinyl cover prevents scratches and prolongs cable durability Meru is making massive strides in concussion prevention by being able to control the head movement throughout the entire length of impact which results in a major reduction in Head injuries For accurate sizing measure the circumference around the fullest part of the neckline and check the sizing chart for the proper size