‘The world’s most eco-friendly shoe’ might seem like a bold claim, but a glance at the materials that make up these chukkas will tell you why collaborators SOLE and United By Blue feel they’ve revolutionized sustainability in the footwear industry with the SOLE x UBB Jasper Wool Eco Chukka. ReCORK recycled wine corks, natural bison hair saved from landfills, ethically-sourced merino wool, algae, natural rubber and rice husks combine to ensure there’s an eco-friendly story behind every component. And the best part? They’re super comfy, breathable, temperature-regulating, lightweight, supportive and durable. All the sustainability, none of the compromise. Order a pair below.