Funny, my toe covers (PI) fit perfectly with my road shoes, but when I wore them with my mtb/Frog shoes, they are now ripped. I'd like advice for toe covers for mtb shoes! It's too warm for my winter shoes (well, maybe not in the upcoming days) and I have several thicknesses of wool socks. Since I will be mostly riding my new bike with the Frogs until the snow flies, I hope to solve this problem. I also ripped my booties using them on my mtb shoes, when I was actually mountain biking a few years ago.