andrew watkinswrote a review of Pearl Izumi ELITE Softshell MTB Shoes Covers on November 20, 2014
Familiarity: I've used it once or twice and have initial impressions
Day one with these shoe covers was 30º. I could hardly tell they were on as the fit was impeccable. My size 9+ foot fit perfectly inside the large shoe cover and cold was no more a factor for my feet. Furthermore, I happened to run out of trail on this first ride and, after a long down-climb with my bike on my shoulder and the only thing I noticed at the bottom was that the toe strap of the cover slipped off. I've been on cold rides since where time was spent off the pedals on short hike-a-bikes, and the kevlar reinforcing seems like it will hold up quite well.