Boy, what a difference. Saturday it was 20-28* with a stiff 15 mph NW wind, and Sunday it was 16-21* with a light breeze. Each sit was 5-6 hours long and I didn't get anywhere close to being cold. That hand muff must be the warmest one on the planet. Overall I'm extremely pleased with my IWOM. Couldn't be happier. I just wish I would have bought one sooner so I could've had it on my trip to Ohio last month, there were a couple days there where I froze my butt off!