Experience durability at its peak with the Women's PhD(R) Outdoor Light Print Crew. Using Smartwool's proprietary 360-degree printing technology, the design gets kicked up a notch while packing a few techy bonusesa "with Indestructawool technology for added durability, activity-specific mesh zones, a Virtually Seamless toe, and the 4 Degree elite fit system, these socks have comfort covered. 55% merino wool42% nylon3% elastane. PhD(R): Built for Performance in the Highest Degree. 4 Degree Elite Fit System: Uses two elastics for greater stretch and recovery to keep the sock in place. Indestructawool technology features a patent-pending construction method for exceptional durability and comfort. Light cushioned sole for added warmth with minimal volume. Body-mapped mesh ventilation zones. Virtually Seamless toe. Women's-specific fit, with a narrower heel and slimmer profile. 7.5 in. height. Machine Wash Warm Gentle Cycle. Do Not Bleach. Tumble Dry Low. Do Not Iron. Do Not Dry Clean. Made in USA of Imported Yarns.