Since my clipless pedals developed a defect, I reverted back to the old Power Grips. I was able to adjust them to accept my lightweight waterproof hunting boots which have (I think) 200 grams of Thinsulate insulation. Three hours of triking at 24 degree temps with a 15 mph wind left my toes in much better shape than they were when riding with clipless sandals, two pairs of socks and a neoprene bootie. The boots are heavier, of course, but still got the job done. I think from now on I'll use Power Grips for cold weather riding.