- Size: 40/41 • Soft flannel outer material and lining, no shedding fur. • Open design, easy to slip on, perfect for hot days. • High elasticity memory foam sole, with enough cushioning and support. • Outsole with wavy design that prevents slipping on wet floors. • Lightweight sole that does not damage the floor, including wood and ceramic tiles. • Excellent noise insulation, does not interfere with sleeping family.