Cascade Heritage Paints
I’ve been using Cascade for socks for quite a while. While it does wash well in the machine, the dryer is a little too harsh for hand knit socks. I had someone tell me to turn my socks inside out before washing to protect the outside from wear & then to lay flat to dry. I haven’t tried it yet with brand new socks, but it sounds like it would help extend the life of the socks.