[1] Fly and mosquito protection is an important part of overall horse care, as biting insects are both a source of irritation and also may transmit disease.
[further explanation needed] Most masks are made of black or white mesh, though some are colored, plaid or have silkscreened designs on them that do not interfere with vision.
Some designs have an extended flap that covers the muzzle but does not go around the lower jaw or interfere with grazing.
Most attach with velcro, but a few high-end designs made with mesh and stretch lycra need to incorporate zippers instead.
The other is a soft, very fine mesh face and nose-covering mask designed to be worn with a bridle and not impair vision, but not sturdy enough to withstand turnout.