Acorn Polar Moc - You don't have to live at the North Pole to appreciate the warmth and comfort of the Polar Moc. Printed fleece upper is soft and warm. Cozy microfleece lining wicks moisture to keep your feet warm and dry. Acorn™ memory foam midsole over a cushioning layer of lightweight EVA is like a pillow for your feet. Slip-on styling. Weatherproof outsole is perfect for indoor/outdoor use..