The Castelli Mid Winter 18 socks are constructed from a warm merino wool blend like a winter sock, but have the thickness of a summer sock. This design means there's no added bulk or change in the fit of your shoes when you want a little extra insulation on those cool rides.

The Castelli Mid Winter 18 socks are constructed from a warm merino wool blend like a winter sock, but have the thickness of a summer sock. This design means there's no added bulk or change in the fit of your shoes when you want a little extra insulation on those cool rides. cuff length  18 cm fabric  60% wool, 30% Polyamide, 10% Elastane