Meru Safety Racing Ascent Carbon Head & Neck Restraint with Quick Release Tethers & Shock Absorber Reduces Force from Frontal Impacts (Large X Large) Grease Gun The dual gear counter balance VY The dual gear counter balance mechanism provides up to 4x lower vibration than traditional reciprocating saws Want to be noticed next time you're out riding Unlike other common FHR devices that bring the head to a stop quickly which can cause concussions 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