Heat Holders was developed by there talented product development team in house. The challenge was to make a sock that would be the warmest sock ever and comfortable and practical to wear in daily life. It wasn't easy, but the team came up with Heat Holders in 2008.
Heat Holders was kind enough to send my husband a pair of navy socks. He works in North Dakota so we were anxious to see how warm they would keep his feet.
Why Heat Holders are so warm:
Overally, my husband said the heat holders were very warm. The only issue we had was that I ordered the wrong size so they did slide down his leg from time to time. He would highly recommend Heat Holders just make sure you get the right size. :)
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Disclaimer: This product was sent to me for review purposes only. No payment was received for this review. My reviews are based on my personal opinions and experience using the item. All opinions are my own and 100% honest.