Sox For Horses! Silver Whinnys/Summer Whinnys Antimicrobial silver protects Silver Whinnys from playing host to bacteria, fungus, and mold, in the toughest conditions. It doesnt let up. Potency will not wash away or wear off. Oxygen can reach the skin. Moisture management fiber moves moisture from the skin surface keeping legs dry and cool. Dry-cool skin is not a good environment for bacteria and fungi to propagation. Light and safe level of compression helps legs rest and offer hours of protection between adjustments. Flies can't bite through. Double layered high-tech protection for when leg issues must be kept clean and free of dirt, flies and debris from the barn environment. Machine Wash and Dry. Made in America  Durable; horse-tough.