Filter vaults are made from a special, high-density glass epoxy material that is approximately half the weight of aluminum, yet far more capable of resisting abrasion, friction, impact, corrosion and material fatigue. As most photographers are transitioning away from resin filters to glass, filter breakage has become a real problem. We’re addressing the problem head-on. Filter vaults protect the filter during transit and use, and increase image quality by eliminating internal reflections and filter-flex caused by inferior holder systems.