<P> 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 . Fly masks are adjusted to cover the upper head and stop about halfway down the face, but the placement of stitched darts prevents the mask from rubbing on the eyes . Most have fleece padding around the muzzle and other sensitive areas . Masks come both with and without covers for the ears . 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 . </P> <P> A standard fly mask is not generally used while riding, as the stiff mesh interferes with the bridle and the minimal visual impairment of the mesh presents a safety issue . Other styles of insect protection gear are designed for use with a bridle . One design is a crochet - like "bonnet" for the ears only, designed to be worn under a bridle without rubbing . 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 . </P> <P> It is generally recommended that the mask be removed and inspected daily and washed frequently . Some individuals remove the mask at night . </P> <P> The appearance of fly masks often raises concerns among non-horse owners, as it appears that the horse has been blindfolded . However even a durable mesh is fine enough for the horse to see through . Some masks have sunglasses or cartoon eyeballs silkscreened on them to help passers - by understand their purpose . </P>

Why do horses have bags on their heads