Tierra Garden GPW1750 Super Tough Lawn Spike Shoes Durable Lawn Spike Shoes helps you aerate your lawn with ease Spikes help penetrate the soil and allow air, water and nutrients to reach the roots Strap over your shoe or boot, then walk slowly up and down the lawn allowing the spikes to penetrate the lawn for maximum aeration Spike shoes are made of super tough nylon and comes compete with adjustable straps Fits most shoe sizes