Solar-powered clothes, for the heat and cold

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https://www.science.org/doi/10.1126/science.adl5650] 

By XINGYI HUANG AND PENGLI LI, Science. 

Excerpt: Clothing plays an indispensable role in maintaining the human body temperature within a comfort range in our daily life, especially when facing sudden temperature changes or in harsh environments (1). ...Wang et al. (3) report a full-day, self-powered, and bidirectional thermoregulatory clothing that can quickly respond to fluctuating temperature. ...Wang et al. ...designed and fabricated a wearable thermal-management system by combining an organic photovoltaic unit and an electrocaloric unit into a single device with the required flexibility. The device also achieved bidirectional thermal management, providing 10.1 K of cooling to the skin during hot days but also keeping the human body 3.2 K warmer than bare skin in the dark or at night by using additional energy collected by the organic photovoltaic unit.... 

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