FMA Helmet Counter Weight Bag (Dark Earth).

Counterweights are a good way to balance the helmet while deploying night vision goggles or when using GOPRO.  They aid in the comfort of the helmet over long use duration be keeping it from nose-diving due to the cantilevered weight of the goggles.  Counterweight System is very low profile and boasts the most secure design of any helmet counterweight on the market due to the fact that it attaches via Velcro and the rear bolts of the helmet.