Remember to measure for the perfect fit. The ThinLine Turnout Horse Halter is designed to work with the Flexible Filly Muzzle (sold separately). Strategically placed keepers help to secure the muzzle in the correct position. The keepers support the muzzle so it stays clear of the lips and nostrils, while also keeping it from shifting. This nylon halter is highly durable and features a leather breakaway crown piece for your horse’s safety. Two buckles at the crown connect the leather breakaway and allow for an adjustable fit.