Vans Harbor Mule VR3 Shoes. Is it a shoe? Is it a slide? Well, it’s a little bit of both. It’s a mule, and it’s 100% awesome. The Harbor Mule VR3 features a one-piece suede upper lined with recycled soft and fuzzy textiles for a fit that you’ll want to sink into day in and day out. The midsole uses the same VR3Cush™ found in the UltraRange VR3, and features a full-length VR3 Waffle Regenerative rubber outsole for the durability and grip that’s been built into Vans shoes since 1966. It’s that simple: easy on, easy off. . . wherever life takes you. The upper is made with suede and fabric made with 100% US cotton from farmers using agricultural practices that can help improve a soil's ability to absorb carbon. The VR3Cush™ midsole is made using at least 50% bio-based EVA foam partially derived from plant-based sources per the ASTM D6866-16 testing standard. All of the rubber used to make this VR3Waffle™ outsole is responsibly sourced natural rubber obtained from sources that follow proven sustainable practices with the intention of reducing impacts on the planet. Imported.