Our Merino 10 socks use a distinct blend of Merino wool and Tencel Fibers to create a more advanced Merino sock. Newly redesigned with a reinforced heel and toe for added durability and crafted with Targeted Compression and Anatomical Design to provide a superior fit and feel. Merino 10 insulates when wet - keeping your feet warm in wet, cool conditions. Targeted Compression and anatomical design provide an unmatched Custom-Like Fit. Anatomical design enhances fit, delivering maximum comfort and protection by eliminating blisters. High density cushioning provides extra protection in high impact areas. The Perfect Toe. (No irritating toe seam.) Plus, newly redesigned with a reinforced toe and heel. 44% Nylon, 27% Wool, 27% Tencel, 2% Spandex.