Guys I am very happy with how these turned out. Braided fiberglass, high temp silicone, carbon fiber felt, cordura, a fulll velcro seam and a ring of Kevlar at the base to keep it from sliding forward. I'll put this up against any cover on the market. I am 100% confident that it will be the best cover you have ever owned. Check them out PrecisionUndergroundRifleGear.com