Getting out when the weather is dismal can take some convincing, but Castelli is there to keep you warm through dreary days with their Sfida 13 Socks for women. A merino wool blend insulates your feet with soft warmth, and thick terry construction underfoot adds extra cushion and coziness. At 5. 11-inches, you'll have a decent amount of coverage, either offering a little warmth to your lower calf on cool fall rides, or sealing the gap completely from your tights to winter boots when temperatures plummet.