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ThinLine Breakaway Field Safe Headcollar
ThinLine Breakaway Field Safe Headcollar
Price £49.99 inc VAT

This Halter is designed for use with the Flexible Filly Grazing Muzzle

Our grazing muzzle halter is designed with your horse’s comfort and safety in mind. It features strategically placed “keepers” that make it easy to attach and use the Flexible Filly Muzzle. With these keepers, you can be sure that your grazing muzzle is securely in place and will not shift.

The halter with the Grazing Muzzle and ThinLine Halter Padding Set attached are shown below.  You can see how the specially designed halter puts your muzzle in exactly the right place for the greatest comfort for your horse and ease of use for you.

Grazing Muzzle Halter zip tie closeFlexible Filly Halter Close UPHalter Horse Turn OutGrazing Muzzle Halter close up WEBGrazing Muzzle Halter Close up

Simply thread the muzzle holder ties through the halter so your horse experiences rub-free muzzle grazing!

The two stainless steel buckles hold the leather breakaway and provide you with adjustability to ensure a perfect fit.

Available in six sizes; medium-mini, small pony, large pony, cob, horse, and oversize.  The halter intentionally does not have an adjustable noseband.  You might feel the noseband is a little roomy when you receive it but please go ahead and attach your muzzle.  We designed this for the best in rub-free comfort!

Rub-free halter and halter covers are sold separately from the muzzle.

This Flexible Filly Horse Grazing Muzzle is unlike the typical heavy, hard, and “cage-like” apparatus of the past. We listened to horse owners just like you and designed this to be softer, lighter, and less confining. Constructed of a durable and pliable material that radically improves comfort, it is also soft on equine teeth and lips. The Flexible Filly Muzzle; is well-ventilated and safe, rated to break just before your turnout halter.  The grazing hole size is adjustable.

If you would like to order the Flexible Filly Muzzle, you can just click here!



These measurements can be compared against a well-fitting halter to determine which size of the ThinLine Breakway Halter will be the best fit for your horse.  Measurements are of the webbing only, they do not include the halter hardware. Hardware is 2″.


(A)Noseband (B)Chin x 2 (C)Cheek x 2 (D)Throatlatch (E)Breakaway Leather Crown
Medium Mini


10cm 14cm 32cm


Small Pony 24cm 12cm 16cm 36cm 44.5cm


14cm 18cm 43cm




15cm 19cm 47cm




16cm 20cm 51cm



32cm 17cm 21cm 55cm


Halter measurments

How to attach your Flexible Filly Grazing Muzzle to the ThinLine Flexible Breakaway Halter?


  1. Use the enclosed paper ties or a string to discover the best holes to secure your muzzle to your ThinLine breakaway halter.  The paper ties are a temporary tool allowing you to easily adjust the fit.
  2. Two of the “fins” have a triangle cut out. These attach to the square (side) rings on your turnout halter. Three fins will connect to the noseband, one in the center, the other two fall naturally to the sides of the center.  Three fins will connect to the chin band; one in the center, two naturally to the sides of the center.
  3. First, secure each triangle cut-out fin with one of the enclosed low-profile cable ties.  Do not wrap the fins around the halter, doing so may cause rubs.
  4. When properly installed, the muzzle should be close to but not touching the nose of the horse. If the muzzle is touching the nose simply make the fins under the chin longer, this will lift the muzzle away from the nose.
  5.  Once you are satisfied you have the correct holes aligned to the halter please remove the paper ties or string and permanently secure the muzzle with the included cable ties.
  6.  After finding the best fit for your horse, simply trim the excess fin material just above the top hole being used.  It is fine to wait a day or two to ensure your muzzle is a comfortable distance from your horse’s mouth before trimming. The “keeper” on the cable tie is on the outside of the muzzle and the excess is facing down and trimmed close.

If you have fitted the muzzle properly and the muzzle is the correct size it will work famously. If you find there is too much grazing room be sure your fins are snugly secured to your breakaway halter. The fins should not move along the noseband. If it does simply pull the cable tie tighter.
ThinLine Flexible Filly Slow Feed Grazing Muzzle howto

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