Smart-apparel and wearables are gaining traction very quickly.
In this case, a group of PhDs have created a smart fabric, from stainless steal yarn, that gathers thermal energy from the sun and/or artificial light, and uses it to keep you warm.
In contrast to most coats that are designed to recycle your own body heat to keep you warm, ThermalTech soaks up energy from light sources, and uses it to warm the wearer from outside in.
Also, when there is no light, ThermalTech fabric apparently holds on to heat longer than other fabrics, and also continues to work similar to a traditional jacket that recycles body heat.
The company has launched the product via an Indiegogo campaign, and already has reached 110% of its $25k funding goal.
Source: Indiegogo (link)
ThermalTech Indiegogo Video
ThermalTech Product Photos