Crocs Yukon: The Crocs Yukon are leather upper & add a rugged sophistication to this traditionally comfy clog. The Yukon looks great with your favorite pair of comfy jeans, cargo pants or shorts. The ventilation ports increase breathability and filter water and debris away from the footbed with the loose fit allowing the foot to bend and expand naturally, reducing fatigue. They come with a slip resistant and non-marking sole.