Betty London MARILENE women's Low Ankle Boots in Grey Leather, Available in women's sizes. 3.5, 4. Your Easy Shoes! Model with Y.E.S.: memory foam with breathability, durability & anti-bacterial properties. The YES technology offers a cushioning memory sole that provides immediate & lasting reception comfort. MEMORY OF SHAPE: The foam, chosen for its durability properties, absorbs shock during walking, which protects the foot & the joints. BREATHABILITY: The foam used is also composed of open cells, promoting the evacuation of perspiration & therefore good breathability of the foot. ANTI-BACTERIAL: In addition to its natural properties, open cell foam is treated with an anti-bacterial treatment. To learn more, click here. Free Next Day Delivery & Free Returns on all orders!