Urdin. It's 'blue' in the Basque Country. We've done a time or two at the Tour and if there is something you'll never forget it's cycling fans of The Basque Country. Get yer'self over yonder for a spin and drink some kalimotxo (coca-cola and red wine) post ride. It's an acquired taste, but when in Rome do as the Romans...as is said.
CARING FOR YOUR SOCKS
Hand or machine-wash on delicate using a mild detergent at 30° C or 86° F.
Air or line-dry; lay flat if possible.
DO NOT BLEACH, IRON, OR TUMBLE DRY.