The PGD Dial System is the standard retention system on the PGD Gen3 helmet and features the following improvements over other factory helmet strap systems: Large nape pad set at a lower position on the user's neck to better support the helmet, and prevents helmets from shifting downwards BOA ratcheting system for rapid, secure adjustment and fast release Large, soft, rate-sensitive memory foam nape pad for the ultimate in operator comfort Multi-point adjustment to fit a variety of operator head sizes and neck lengths Made in the EU The PGD Dial System can be used to retrofit other helmets including but not limited to: Ops-Core Team Wendy Crye Precision Galvion *NOT compatible with MTEK helmets The PGD Dial Retention system completely replaces your factory helmet strap system and easily installs by removing and reinstalling 4 helmet rail bolts.