I have ridden about 500 miles in the rain using these rain covers, my feet have stayed perfectly dry. I wear a size 10 book and purchased the appropriate size. The fit is good, the only complaint is the strap that goes under the book wants to stay under the heel of the boot so I just put it in front of the heel. The rubber bottom of the boots are more slippery than my boots on wet pavement, definitely something to watch out for. If your a short rider on a tall bike, these might not be right for you. But if you can get both your feet on the ground they work great! The Velcro on the back that holds them together is VERY strong, I trust that it will last for a long time. The reflective features of the boots are nice. For the price I think they are a great set of boot covers.