Ryka Aurora Womens - Casual The Aurora provides the functionality of a winter boot with the lightweight comfort of a sneaker. The upper features a quilted microfiber treated with a Durable Water Repellant finish. The outsole features rubber in key areas to prevent slipping on slick surfaces during inclement weather. A brushed tricot top cloth provides a warm sock liner beneath the foot. Details: Quilted microfiber and synthetic overlay upper treated with durable water repellant to keep her feet dryPrecise-Return™ footbed sock linerMolded EVA midsole for lightweight comfortLightweight outsole grade EVA features rubber in key areas to help prevent slipping on slick winter surfaces9.2 oz