Good quality socks that fit extremely well and comfortably. Although it's not clear from the photo, these are calf length socks, so the elasticated top comes just below the knee and above the calf. The elastication is snug without being restrictive. The "Laulax" logo is also far enough up the sock that it won't show when worn with trousers.
I ended up buying three pairs in blue and three in black. Highly recommended.