This men\\\'s warm-lined chukka is made with a combination of natural and recycled materials. The upper is premium Better Leather, which is sourced from a sustainable tannery rated silver for its environmental processes. The eco-conscious GreenStride comfort sole is made using 75% renewable sugar cane and sustainably sourced natural rubber from trees. This waterproof chukka features our TimberDry membrane technology for full protection from wet weather whilst still allowing your feet to breathe. Lastly, the warm, full lining is made of at least 50% recycled plastic diverted from landfill. Size 7