Rapha ProTeam Winter Socks. These are new, size M, recommended for 25-27 cm. Shipping is via Yu-Packet Mini, and it's free. Even among professionals, cold feet can be a source of dissatisfaction. The Pro Team Winter Socks, made with a super-lightweight, warm merino wool blend, are warmer than typical thick materials and keep your feet dry for extended periods during hard rides. They are thin enough to fit comfortably inside winter shoes without restricting foot movement, and they have a longer length with reinforced toes and heels for durability. These socks were created for speed and comfort in cold weather.