One of my first Oakley's, many years back. M Frames just never really fit my face, thus I never really wore these. Thinking of potentially parting with them, so I can obtain more pairs I can wear consistently. However, I need help identifying the specific model. I think they are this pair via O-Review? M Frame Heater (Gen1) - Crystal Clear / Blue Iridium?? M Frame Heater Crystal Clear / Blue Iridium View attachment 273216 View attachment 273217 Also, what's the definition of the Mumbo M Frames?