# Chemistry/physics of Thermacare Continuous Low-level Heatwrap Therapy (CLHT)?

**URL:** <https://boards.straightdope.com/t/chemistry-physics-of-thermacare-continuous-low-level-heatwrap-therapy-clht/597334>\
**Category:** Factual Questions\
**Created:** [September 23, 2011, 3:03pm UTC](https://boards.straightdope.com/t/chemistry-physics-of-thermacare-continuous-low-level-heatwrap-therapy-clht/597334 "2011-09-23T15:03:35Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![janeslogin](https://avatars.discourse-cdn.com/v4/letter/j/df788c/32.png) [@janeslogin](https://boards.straightdope.com/u/janeslogin)\
**Post date:** [September 23, 2011, 3:03pm UTC](https://boards.straightdope.com/t/chemistry-physics-of-thermacare-continuous-low-level-heatwrap-therapy-clht/597334/1 "2011-09-23T15:03:35Z")

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My Chemistry and physics courses were 50 years ago and I am pondering how Thermacare Continuous Low-level Heatwrap Therapy (CLHT) stay warm for so long. I only find medical references as to how the heat works. I haven’t found chemical/physics references as to how the heat is produced. Could you give us a simple explanation?

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**Author:** ![spingears](https://avatars.discourse-cdn.com/v4/letter/s/ebca7d/32.png) [@spingears](https://boards.straightdope.com/u/spingears)\
**Post date:** [September 23, 2011, 7:12pm UTC](https://boards.straightdope.com/t/chemistry-physics-of-thermacare-continuous-low-level-heatwrap-therapy-clht/597334/2 "2011-09-23T19:12:17Z")

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Holds heat due to excellent insulation most likely.

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**Author:** ![bump](https://avatars.discourse-cdn.com/v4/letter/b/7c8e57/32.png) [@bump](https://boards.straightdope.com/u/bump)\
**Post date:** [September 23, 2011, 7:16pm UTC](https://boards.straightdope.com/t/chemistry-physics-of-thermacare-continuous-low-level-heatwrap-therapy-clht/597334/3 "2011-09-23T19:16:32Z")

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Or high specific heat…

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**Author:** ![Baracus](https://avatars.discourse-cdn.com/v4/letter/b/2bfe46/32.png) [@Baracus](https://boards.straightdope.com/u/Baracus)\
**Post date:** [September 23, 2011, 7:30pm UTC](https://boards.straightdope.com/t/chemistry-physics-of-thermacare-continuous-low-level-heatwrap-therapy-clht/597334/4 "2011-09-23T19:30:09Z")

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Rather than a random guess, here is a link to a FAQ on the thermacare website that has some helpful information under “How it works”.

[http://www.thermacare.com/Faq.aspx](http://www.thermacare.com/Faq.aspx)