From Amazon
FALKE Men's RU4 Endurance M SO Cotton Anti-Blister 1 Pair Running Socks, Black (Black-Mix 3010), 11-12.5
The product is available from £15.33 at international stores.
Running Point
Falke RU4 Running Socks Men - Black, Grey, Size 39 - 41 - 39 - 41