Fitting the Fly Mask:
The lower edge of the mask should reach one to one and a half inches below the bottom of your horses cheekbone for best coverage.
Be sure not to make the mask fit too snug; you should be able to easily slip your finger between the mask and your horses face.

To put the mask on, first open the double locking fastener. Gently place the mask on the horses face with the ears and forelock showing through the top opening. Secure the double locking fastener under the jaw; making sure you allow a couple of fingers width between the fastener edge and the horses throat latch.
The fabric of the mask needs to stand out well away from the eye, giving total clearance to the eyelashes. The eyelashes should never be poking through the mask.
When you've fastened the mask with the correct amount of snugness and checked for fit elsewhere, look carefully from the front, side and rear of your horses head to be sure it clears the eye from every angle whether his head is lowered or raised.
It is recommended to remove the mask nightly and check your horses face and eye condition. Check for damage on the mask. Ripped or worn areas of the mask can let insects in and stray fibers from the mesh may irritate your horse, especially if the damaged part is near their eyes. Masks are difficult to repair properly and it's a good policy to replace them when damaged.

To Care for your fly mask:
Be sure to keep the mask clean. Simply dunk the mask into a bucket of water with a squirt of mild liquid soap and slosh it around (gently) until all the dirt has loosened and washed away. Be sure to rinse well. Check the fleece for trapped burrs and such.