Each aerating sandal features 13 solid metal spikes, each 2 inches long, ensuring air, water, and nutrients penetrate deep into the soil for a thicker, healthier lawn. Designed with three adjustable metal-reinforced nylon straps, these grass spike shoes provide a secure and customizable fit for different shoe sizes, keeping them firmly in place while you walk. Effortlessly aerate your lawn while getting a light workout—no need for bulky, expensive equipment. These spike shoes offer a cost-effective and efficient way to maintain a lush, green yard.