Graduated Leg Upper. Ventilated Airflow Mesh on Top of Forefoot and Instep. Light Arch Support. Unisex Sizing:

XS= Mens 4-6, Womens 5-7

SM= Mens 6.5-8, Womens 7.5-9

MD= Mens 8.5-10, Womens 9.5-11

LG= Mens 10.5-12, Womens 11.5-13

XL= Mens 12.5-15, Womens 13+

Over Calf Socks

Bamboo charcoal was discovered during the Ming Dynasty in 1486 AD. Today, Molecular Nano Bamboo Charcoal is made when bamboo charcoal powder is refined at temperatures over 700 degrees. Nano Bamboo Charcoal Fiber is able to release Far Infrared Rays that may promote blood circulation and increase anion production, which is very good for physical health. Nano Bamboo Charcoal is also a natural deodorizer, has innumerable hole structures and can absorb and decompose benzene, phenol, methanol, sulfides, nitrides, etc. It helps reduce odors from NH3 gas, adjusts for moisture, releases anions and restrains microbial growth. Another benefit of Nano Bamboo Charcoal Fiber is its ability to regulate skin temperature. NBCF may keep your feet cooler in the summer or warmer in the winter than traditional materials. Nano Bamboo Charcoal is not only more sustainable than hardwood charcoal due to its rapid growth cycle, but also protects the environment as no chemicals are required for this product to have such wonderful properties.