This is maybe my favorite sock so far. There are lots of patterned socks out there but many of them are just a bit too feminine and I wanted something I could wear myself. The yarn is a mystery yarn; lots of the interesting yarns available here are export yarns by Turkish companies, which aren't normally sold here. The law says that when they're sold here, they aren't allowed to label them any more specifically than "[Brand name] Export". All I know is that it probably sells for a lot more outside Turkey than the $4 equivalent I paid here. :) The yarn looked a lot more uniformly green when I got it, but when it knit up, it fluffed a bit and the other colors became much more evident.
It's a cuff-down sock, and the pattern is also available for free on Ravelry, in two sizes. I wear an 11 1/2 shoe so I made the bigger pattern, with 2.5 mm needles, and it came out just a bit loose. If I do it again, I'll use 2mm for it, or make the smaller version with 2.5. As it was, I ended up shortening the toe, doing four rows with decreases on every row instead of putting plain rows in between, so keep that in mind if you plan to do it and wear anything less than a men's size 12!