OluKai Mahana Men’s Heather Gray Cotton gray quilted slippers Men’s size 12 OluKai Mahana slippers, nice rubber sole to wear outside as well. Quilted gray material with leather trim. Really nice gel insert for comfort. Excellent preowned condition. Just like throwing on your favorite hoodie after a long day in the studio, in the water, or on the mountain—the Mahana slipper was crafted to warm your feet and soothe your soul with a lightly insulated heathered jersey upper matched with soft terry cloth lining for unparalleled step-in comfort.