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.
I ride a bike in the morning and these certainly take the chill out of the toes. They are thin and fit well into the shoe without taking up too much room. They stay a nice even temp. They do not stay warm as long as the package says but still happy. The vendor had a great price and delivery was fast.
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