We use these for skiing and they are great! Just make sure to put the shiny side down. Also as you are putting them in your boots - don't wait too long between opening the package and putting them in because they can poof up (but that goes away after you put your foot on them and put weight on them). The M/L fits my shoes (women 9) and my husbands (men 9) great.
Grabber Footwarmers are excellent if you need to stand in the cold for several hours or if you have footpain that is triggered by the cold. They are an excellent product at an excellent value.
In subzero weather driving the Polaris to clean the snow off of the driveway or going shopping these are great even without socks they keep my feet toasty warm. I only wish I could have found them for my husband when he was doing chores and digging us out of the snow on our farm all those many long years. If your wondering how long they last after two hours cleaning the driveway I came in and removed them from my snow boots and stuck them in my slippers and they kept my feet warm until I went to bed about 8 to 10 hours after I opened them. I cant see living up here without them ever again.
The first time I used the warmers, my feet became Happy Feet! Have not tried them for very cold climate yet...32 degree night only thus far. Will update review after weekend in January in NYC.
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