UPPER: Leather Working Group Gold Certified Oiled Nubuck Leather: 30% Recycled Polyester Mesh: TPU heel counter: B-DRY Waterproof Membrane: 100% Recycled Polyester Laces: 100% Recycled Polyester Webbing: Micro-injected PU window INSOLE: O FIT Insole. Our proprietary insole is what weÔÇÖre known for. Molded to match the specific shape and construction of every pair we make, this purpose-designed technology delivers the kind of fit, feel and performance thatÔÇÖs unmatched in the industry. MIDSOLE: ACT+Midsole. A proprietary rubberized EVA that adapts to varying terrain. This unique blend of dualdensity, lightweight cushioning system provides the wearer a high level of energy efficiency and a softer heel strike landing zone. OUTSOLE: Trail Tread Rubber. ObozÔÇÖs most-tested rubber compound boasting superior slip-resistance, enhanced durability, and improved elongation and tensile strength. Oboz B-DRY Waterproof: ThereÔÇÖs no denying feet sweat and trails can get muddy. ThereÔÇÖs also no denying the ability of our proprietary waterproofing system, B-DRY, lets sweat escape while keeping moisture out.