This yarn is available exclusively from Happy Knits.
Merilon Sock comes in 100g skeins composed of 75% superwash merino wool and 25% nylon. Unlike many merino nylon blends, this sock yarn is very soft, with multiple plies and no halo. It knits up a very bouncy sock and feels wonderful next to the skin.
If you are looking for my 100% Merino sock yarn, called Pebble Sock, see here in the Ravelry database. If you have 45 Deg N from Twisted, you are also looking for Pebble Sock.