leatherTWX™ upper. leatherTWX™ material utilizes 80% recycled leather that would otherwise end up in landfills. Zero-X™ shoes are made without glue, utilizing an independent interlocking stitching system to ensure fit and durability Bamboo laces Air mesh lining BioBlend™ internal midsole Rubber outsole integrated with blended rice husk. Blended rice husk is an agricultural by-product that is typically thrown away.
