Fly Free Fly Free Horse Boots (assorted colors) WRS Fly Boots For Horses Pro Tech PEI Active Equine Tough 1 Comfort Mesh Fly Boots 85 810 Fly Free Fly Free Horse Boots (assorted colors) WRS Pro Tech Bug & Fly Boots Hertfordshire Tak Shak. Boot features: Breathable mesh "Stay on" technology 1. 5" velcro down the height of the boot double velcro enclosure at the bottom for maximum security and adjustability Heavy duty stays for support Sold in a set of 4. Standard horse size fits a range of 13h 16. 3h horses Boot measures 14. 5" tall and 15" around the bottom Fly Free Boots provide your horse's legs with protection against flies and biting insects. Easy application while having an adjustable, yet secure closure to avoid unexpected boot loss.