The new Windmill Stormproof lighter passed the freezer test. It spent the night in the freezer with the flame level set right in the middle between + and -. I took it out of the freezer this morning and immediatly lit it before it had a chance to warm up. It lit right up on the first push of the button. I plan to do this a few more times just to make sure this wasn't just dumb luck. I will also have altitude test results after the holidays are over.