These are some of my best shoe covers. I use them between 31-39 degrees Fahrenheit. The conform well to my shoes and I like the fact that they are not bulky, yet still very warm, and I would say I have slightly cold feet compared to most riders. I also think they would do well in damp conditions, although I have yet to test them in those conditions.
I've only gotten to wear them one time, but they were easy to put on & comfortable & warm on my wet & cold ride & were easy to take off when I finished my ride
This is my second set of AV 300 covers. My first pair lasted about 1 winter and would likely have made it a few more but I had a few slips and cornering incidents that ended up tearing the bottom and sides. While probably not the best durability ever, they are definitely well made with quality materials. Overall they did a great job keeping my feet warm in late fall and into winter. They go on and off over my normal road shoes very easily.