Very happy with the service, material quality, and manufacturing quality of the socks. Very comfortable and keep feet (but not calf) warm. Not very happy with size though. I ordered X-Large as I am size 11 shoe/boot and my son size 13. I struggle to get them on and my son just can’t. Once they are on they stretch some. However, they are darn near ankle cut, as they don’t even reach my calf muscle. This is a problem as then my bare calf rubs on my high top boots. Not sure how GRIP6 is measuring sizes, but they need to address this issue. Making larger might add to unit cost, but I would happily pay a premium for a much larger, over the calf, sock of this quality and manufacture. Anyone larger than 6 feet tall and with size 11 and up will have issues with current size. Please make a much larger over the calf big and tall sock that is actually X-Large.