Hubby loves them. First thing he did was try them on, and said, "They fit perfectly!" [He wears a large glove, they have a nice lining and are "comfortable and flexible" and very well made.] He's an engineer and thinks like an engineer so he 'tested' them by first putting on the gloves, pressing his hands against on the BBQ lid exterior next to the thermometer gage which read 550 degrees, and held his hands there for 10 seconds. [Sorry, no photo of actual test but perhaps soon], just his reactio...