Feetures! Elite Merino+ Ultra Light Cushion Quarter Sock - Brilliant Blue/Sherbert Medium Patented Sock-Lock Technology to provide targeted compression where it's needed most. Anatomical design enhances fit, delivering maximum comfort and protection by eliminating blisters. Ultra thin construction takes up minimal room inside the shoe Merino+ fibers wick moisture to keep feet dry and odor-free. Merino+ insulates when wet - keeping your feet warm in wet, cool conditions.