I used the Klim havoc boot for 2 years on a snowmobile. This year i have to wear a brace till spring then get a knew knee. These boots are quite tall at 14.5 inches. Top part of boot is a Velcro closure. For me i could not close the top around my knee brace. But the boot was always warm and never wet. excellent support. I went with fxr xcross boa. very comfortable boot, warm and dry. 65 years old now and the body has issues. 50 plus years on snowmobiles and dirt bikes. And i am not quitting. Some of the best times are now laughing at myself for. How did i do that. Always in the trees, but it seems like they are always getting closer together.