Premium Merino Wool Cycling Socks for All-Season Comfort SHIMANO S-PHYRE Merino Socks combine premium natural fibers with performance-focused construction for soft, breathable comfort in every season. Made with 60% Australian extra-fine Merino wool, they provide natural warmth and moisture management, while targeted arch and heel support enhance stability on the bike. Features Comfort in Any Season: 60% Australian extra-fine Merino wool offers natural softness, warmth, and moisture management Stay-Up Performance: Pique knitting provides additional grip to keep socks up even on the most challenging rides Arch and Heel Support: Arch and heel supports provide additional foot stability while pedaling Long-Ride Stability: Durable, reinforced ribbing delivers long-lasting heel stability Extra-Fine Merino Comfort Made with 60% Australian extra-fine Merino wool, these socks deliver natural softness, warmth, breathability, and moisture management for comfortable riding across all seasons. Secure, Supportive Fit Pique knitting technology adds grip to help the socks stay securely in place, while targeted arch and heel support provide stability, and reinforced ribbing enhances durability around the heel.