Hi! My name is Raivis Ozolins (LinkedIn) and I am the creator and godfather of the PainFree Leggings brand. It is a family business started from a personal problem with knees in pain.
In the winter 2020/2021 I suffered a lot of pain in the knees, that it was difficult to fall asleep at nights and in the mornings I could get down the stairs only with additional support. 
Our family created PainFree Leggings as we could not find any convenient solution on market so far. And with the convenience we mean - 1) product to prevent knee pain as consequences from cold and humidity & 2) would be suitable (comfy and thin) for daily use separately or under any other clothes.