24 inch leg length extra long above the knee Heavyweight merino wool socks for extreme climates keep feet warm while naturally wicking moisture Smooth flat toe seam offers seamless like feel for reduced irritation Arch support for added fit and reduced foot arch fatigue Reinforced heel and toe provides added durability for a long lasting sock life 24 inch leg length extra long above the knee Heavyweight merino wool socks for extreme climates keep feet warm while naturally wicking moisture Smooth flat toe seam offers seamless like feel for reduced irritation Arch support for added fit and reduced foot arch fatigue Reinforced heel and toe provides added durability for a long lasting sock life High performance boot length socks are perfect for waders, motorcross, thermals, fly fishing, and more.