Questions for ‘New cloth cools you when you’re hot and warms you when you’re cool’
![a photo of a fireman dressed in fire gear. He is sitting on a fire engine and sweating profusely. He looks miserable and very hot.](https://www.snexplores.org/wp-content/uploads/2022/04/1030_LEM_phase_change_fabric.jpg)
Sweat evaporates from this firefighter, carrying heat away from his skin, which cools him down. This process of sweat’s water changing from liquid to vapor is one common example of a “phase-change.” Firefighters are among workers who might appreciate the new fabric.
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