ErgoMates Anti-Fatigue Overshoes are designed to minimize impact shock, pain, and fatigue for those who have to stand or walk for extended periods of time on hard surfaces. Strapped over the worker's footwear (including work boots), these overshoes have a flexible, slip-resistant, two-ply soles that absorb shock and reduce fatigue. Other features include a self-cleaning tread design, oil/solvent/chemical-damage resistance, and secure/comfortable strapping system. They come in five sizes.