Cashel's Crusader Fly Masks are among the top-voted fly masks year after year and are trusted by horsemen of all backgrounds to protect their equine partners from flies. The Mule/Donkey Fly Mask with Ears and Long Nose is made from soft coated nylon micromesh, making it a very comfortable choice for fly protection for your mule or donkey. Its patented three-hole cap and double dart construction keep the material well away from sensitive eyes, lashes, and temples without damaging the forelock, providing a more natural and complete field of vision. This mask blocks up to 70% of the sun's damaging UV rays, protecting them from eye problems and sunburn. This mask is great for mules and donkeys that have greater sensitivity to the sun and lighter-skinned mules. Our fly mask closure strap features pre-stitched guidelines in 3/4-inch increments, allowing you to trim excess length for a perfect custom fit. See size chart for details on how to measure. XX-Small/Mini Donkey (27"); X-Small/Large Mini Donkey (34"); Small/Donkey (35-37"); Medium/Large Donkey (38-40"); Large/Mule (40"-42"); X-Large/Large Mule (42"); XX-Large/Mammoth Mule (50")