95% cotton / 5% lycra Sole materialRubber. The durable rubber sole with non-slip traction lets you leave the house to pick up the mail or walk the dog. Outer material Synthetic. The breathable waffle knit upper helps prevent sweaty feet, keeping your toes dry and odor-free. Internal material Synthetic. The memory foam footbed adapts to the contours of your foot for soft, cushioned comfort; Treat yourself after a long day at work, or give your working husband or father's tired feet a well-deserved rest. Men's Two-tone Memory Foam Slipper