Abstract: A thermally insulating collar device for use with metallic fittings such as quick release fittings where use with hot liquids or steam can cause the metallic fittings to become hot. The collar device is made from a thermally insulating material such as plastic, and is either formed over and around a fitting as manufactured, or designed as an aftermarket item to slip over an existing metallic fitting. Either embodiment enables manipulation of the movable portion of the quick release fitting in the traditional manner, while providing a thermally insulating layer of material over the metallic fitting to permit easy and comfortable actuation of the fitting, even when heated fluids are passing through the fitting.