Equilibrium Net Relief Muzzle Net in Black. The Equilibrium Net Relief Muzzle Net is an effective solution for relieving the symptoms of head shaking. The Muzzle Net attaches to the noseband of the bridle very easily, without restriction on the type of bit you may choose to use. The muzzle net doesn't interfere with the horse's breathing it just prevents flies, etc from irritating the horse whilst in work, 79% of head shakers improved in clinical trials. The muzzle net is very discreet and the shaped mesh sits neatly over the over the horses's muzzle. Read more… The Equilibrium Net Relief Muzzle Net is permitted by British Dressage and British Eventing for use whilst competing.