Burton Women's Ultralight Wool Socks 100% Other Fibers Imported Constructed from a durable blend of nylon, acrylic, Merino wool, NanoGLIDE , polypropylene, and spandex fabric Polypropylene reinforced footbed is quick-drying and resists odor; Elastic throughout for ultimate arch, ankle, and leg support Flat-stitched toe seam eliminates chafe and bunching; Sock Lock panels use abrasion-resistant NanoGLIDE for improved heel hold and longevity DRYRIDE Ultrawick venting toe panels improve airflow for warmth and dryness; Ergonomic, articulated left and right MotionFit mirrors the anatomy of each foot Stay High elastic comfort band is soft and locks around the calf to reduce sagging; Lightweight warmth for any activity