No real restriction other then it gets alittle warm when your running around in AZ. I find it works great when your trying to be in cover tucked in into the crook of a tree or bush, breaks up the outline of the mask better. When I am moving with it on it moves with my mask and head better then I thought it would. with it off it stays out of the way pretty good, flops a little.
America is all about speed. Hot, nasty, bada$$ speed. -Eleanor Roosevelt, 1936 FLUFFY BUNNIES PUMP Ebay Feedback MCB Feedback