DESCRIPTIONS Our Killington men's leather chukkas mix the performance and comfort of a trainer with sleek leather uppers sourced from tanneries that are audited for their environmental efforts during the tanning process.Plus,they feature SensorFlex™ technology for comfort,flexibility and stability on any terrain. PRODUCT DETAIL • Upper made with premium nubuck Better Leather from a tannery rated Silver by the Leather Working Group for its water,energy and waste management practices • Durable ReBOTL™ fabric lining made with at least 50% recycled plastic • Lightweight and breathable OrthoLite® footbed for cushioning • Dynamic SensorFlex™ technology is a three-layer system for support,suspension and flexibility underfoot • 100% recycled PET laces • Supportive rubber outsole