We just got a couple of pairs to try. My 7 year and 10 year old, who have always worn bonds. LOVE THEM. They just want to wear them all the time, instead of Pajamas. They seem to be keeping them warm in the cool weather.
I found this brand as searching for something low tox after reading about PFAs and other chemicals affecting men/womens fertility. They are move expensive but look like they will last. I have just placed another order. So happy with our purchase.