The Castelli Bandito Wool 18 Sock has the same construction as a summer sock but with enough insulation to make it ideal for cool, conditions. The socks uses a merino wool blend to create a warm, high wicking, and luxurious feeling sock with enhanced durability. An 18cm cuff provides ample coverage for when wearing knee warmers or full tights.Key Features:Merino wool blend ,Thin construction like a summer sock for a close fit in the shoe but with merino for warmth ,18cm cuff.