PRODUCT DETAILS: We combined Targeted Compression and anatomical design with a distinct blend of Merino wool and Tencel® fibers to create a more advanced Merino sock. Lifetime Guarantee Made in the USA • 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.) • Full length calf-crew style for whatever outdoor adventure awaits.