Thin (lightweight), gray (not green) wool; they look well made. I wear a size 10.5 U.S. and bought the socks in a size 3. They are HUGE unwashed, but shrunk down a bit (I'd say to a size 11). Great folks to deal with, and quickest shipping anywhere!

Steve - USA

These socks are great, have bought a few previous, they start off scratchy but after a few wears they soften up nicely.

gunson - NZ

They're socks, what more can you say!

Godwin - NZ