Castelli's Rosso Corsa Pro 15" Socks are designed for top performance, favored by pro athletes on major stages. They feature a unique structure with multiple knitting techniques, providing compressive midfoot support and cushioning pads underfoot. The 200-needle construction ensures extra stretch and breathability, while Meryl Skinlife Yarns reduce odor. The asymmetrical design mirrors foot shape for enhanced performance. These socks offer a blend of comfort and performance, ideal for achieving podium finishes.