I bought these a couple years ago. Work great. Like the plastic front of muff, really cuts the wind. They are made for vehicles without mirrors, so I put the on upside down and use the zipper up to the mirror. They are very easy to take off and on. A lot of days I have them off going to work and take them off, put in saddle bag, on way home. I'm like you about the lower 40s, gets cold real quick.