Skated 12.4 miles in 53:12 (14.0 mph), HR 73%, temp 38-42. My toes were pretty cold by the end of this skate, which is worrisome -- I might be facing overnight temperatures like this during the world record attempt. I could wear my Ezeefit rain covers, which do keep some warmth inside the boots, but I would have to remove my skates to put them on and take them off, and I am hoping to skate nonstop. I looked at the Ezeefit site, where I swear I had seen neoprene boot covers that could be put on without removing skates, but they have vanished. Guess I have to ask around...