Defender Fly Mask

Regularly: $16.99
Today's savings: 35%

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In Stock. Usually Ships within 24 hours.



In Stock. Usually Ships within 24 hours.



In Stock. Usually Ships within 24 hours.

Shipping weight = 0.50 lb.

Product Summary:

Defender Fly Mask Without Ears by Cashel

Designed to provide the ultimate protection from pests with additional UV coverage, this fly mask is made of durable PVC mesh with secure Velcro closures to ensure a comfortable fit.


  • Single secure Velcro closure
  • Poly fleece binding
Item Specifications:

Small: 500-800 lb.
Medium: 800-1100 lb.
Large: 1100-1600 lb.

Gray with Navy Trim

PVC Mesh

Style Item Number Model Number UPC
Large E005909 LRG DEF-L 804381027591
Medium E005909 MED DEF-M 804381027607
Small E005909 SML DEF-S 804381027614

Product Reviews by Customers

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Browse 11 questions Browse 11 questions and 74 answers
Why did you choose this? Store
Lauren C on Jun 6, 2018
Like these for my horses. Inexpensive.
DENISE J on Dec 1, 2017
Lauren C on Jun 6, 2018
Good reviews. Least expensive. My horses don't like fly masks with the ears covered.
Emily M on Mar 20, 2018
Like these for my horses. Inexpensive.
DENISE J on Dec 1, 2017
fit, durability
Elizabeth H on Jul 12, 2017
NANCY A on May 3, 2017
previously purchased this mask, this product is well made and lasts for more than one season, for less$ than other brands which is a plus when purchasing for more than one horse.
NOREEN S on Apr 19, 2017
To keep the flies out of my horses eyes.
Bridget C on Mar 24, 2017
These fly masks fit and wear well.
MELANIE D on Jan 19, 2017
The UV protection is necessary for the one-eyed horse. He wares out masks very quickly out in the field.
Georgia F on Oct 28, 2016
I LOVE these masks. They are reasonable and very well made.
BELINDA C on Sep 20, 2016
The price was right.
SHIRLEY M on Jul 7, 2016
Great price, needed fly masks for this year!
Penny B on Apr 17, 2016
Nice masks
CINDY B on Oct 14, 2015
Donation for charity event
Linda S on Oct 7, 2015
good product, good sale price
LEROY K on Aug 31, 2015
Fits well with lots of eye clearance, comes further down the face than most masks that aren't "long nose" designs, has a double lock velcro closure. It's the only one I buy. Wish they came in a pony size.
Jaye L on Jul 31, 2015
It was on sale and I've used these fly masks before.
Angela B on Jun 28, 2015
needed a second one tore the first one
Aloah D on Jun 17, 2015
I purchased one last year and its the best fly mask I've ever used, comfortable for the horse due to the elastic velcro attachments and the knit fabric. Durable and fit as expected. Purchasing 2 more today!
KATHY G on Jun 15, 2015
used before
JUDITH G on May 2, 2015
I have a few of these fly mask now, Just Love them!
Corrie L on Apr 18, 2015
The mask I have now is torn and falling off.
ELWOOD W on Apr 13, 2015
I have 2 old men quarter horses and a 5 year old paint. The 5 year old thinks it is her job to take the fly mask off the old guys. The Defender Fly Mask makes it hard for her to do that. I have had Defenders before and I just like them.
LOIS K on Mar 30, 2015
Great product and awesome price. Glad I have it, fly season is coming!
JENNIFER C on Mar 14, 2015
Needed 2 new ones. Old ones torn. Great purchase
MELINDA R on Nov 21, 2014
great price and fits my horse well...holds up better than some of the more expensive brands
TAMMY D on Oct 28, 2014
Finally a mask that fits my old gelding. Most larges and draft sizes are too large and regular horse sizes are too small.
He needs masks everyday for sun protection more than flies. Now he has some that actually fit. I am buying extras.
Mary K on Oct 14, 2014
The defender is stronger than those high dollar ones, and the horses seem to leave these on, but tear off the fancy ones.
LARA R on Oct 9, 2014
Great price, decent quality and fit. I like the fact that they are longer that most regular fly masks.
RANDI A on Oct 3, 2014
Cheap but reliable
VIRGINIA H on Sep 25, 2014
looked like a good buy will reserve judgement until received & used
MARY K on Sep 1, 2014
fits my horse good - great construction
PAULA C on Aug 26, 2014
LISA C on Aug 5, 2014
We always bought super mask in the past, but these work just as well for a lot less money!
Peter J on Aug 3, 2014
super quality!!
CATHY J on Jul 29, 2014
The only one I could choose what size to get. I have two horses with big cheeks and the regular horse size doesn't fit. I'll try this one to see if its better than the last one I ordered.
DIANE D on Jul 27, 2014
This is the one flymask my horse can't destroy. Well priced, well made, long lasting, and I never see any rubs or marks on his face. This has become the only brand of mask I buy.
DONNA BETH W on Jul 17, 2014
Try this style for a young horse
PATRICIA G on Jul 7, 2014
Pricing & reviews.
Carla M on Jul 7, 2014
One of my horses is very hard on the Farnam masks. They tend to last less than one summer. I wanted to try something different and this one looks mure durable.
EDWARD W on Jun 25, 2014
Good value for price
Sandra P on Jun 22, 2014
I like Defender Fly Masks because they have bigger sides that cover the jaw bow of the horse.
VIRGINIA W on Jun 19, 2014
good price
SUSAN C on Jun 17, 2014
This is a very nice product I would recommend
Daniel P on Jun 12, 2014
love it
JESSICA S on Jun 9, 2014
this fly mask lasts a long time.
Ari D on Jun 9, 2014
Stays in place better and durable
Marjorie S on Jun 6, 2014
good price
SHELLY M on Jun 1, 2014
Less expensive. Our horses like them.
LUIS O on Apr 29, 2014
best fly masks I have ever found
Lisa D on Apr 23, 2014
Good reviews. Least expensive. My horses don't like fly masks with the ears covered.
Emily M on Mar 20, 2018
fit, durability
Elizabeth H on Jul 12, 2017
What's the fitting measurements on the medium and large Defender Fly Masks?
texanvet on Jul 21, 2014
BEST ANSWER: Specifications:
Size: Small (500-800lbs) Med Pony/Lrg Pony/Cob
Medium (800-1100lbs) Average Horse
Large (1100-1600lbs) Warmblood/Large Horse
What % of uv rays does this block! some other masks reference this?
A shopper on Mar 29, 2015
BEST ANSWER: Soft coated nylon micro mesh blocks 70% of the sun’s damaging UV rays and protects the sensitive, soft tissues of the eyes and forehead.
A shopper on Jul 7, 2014
BEST ANSWER: Specifications:
Size: Small (500-800lbs) Med Pony/Lrg Pony/Cob
Medium (800-1100lbs) Average Horse
Large (1100-1600lbs) Warmblood/Large Horse
Will this mask fit a paso fino in the medium size? It usually takes a cob size which this literature says is "medium". I ordered what I thought was a one size fits all with more than one velcro closing--only one and it looks like it would be large on a clydesdale.
Norris G on Jun 19, 2015
BEST ANSWER: Sizing for this mask is expressed in the weight range of the horse:
Size: Small (500-800lbs) Med Pony/Lrg Pony/Cob
Medium (800-1100lbs) Average Horse
Large (1100-1600lbs) Warmblood/Large Horse
what size do you think i need for a 17h thoroughbred?
A shopper on Jul 9, 2015
BEST ANSWER: I have purchased two large Defender Fly Masks with ears in the past and one most recently a medium without ears. The two large masks are much too large for my 15.2 quarter horse and 14.2 Morgan-cross (who has a huge head). The medium fits perfect. I sew, so I have altered the large masks so they can be used. In my opinion, the large masks would be for a Belgian, draft, or a very large headed horse. Again, my Morgan is short, but she is stout (weighs 1100+lbs and has a large head).
How does the small fly mask fit?
A shopper on May 2, 2017
BEST ANSWER: ALL of the defender fly masks fit very large. I got the medium for my Appaloosa (16H) and could barely make it small enough to fit. The small is too large for my standard donkey.
How small is small? Will it fit a miniature horse & miniature donkey & Shetland pony?
A shopper on Sep 6, 2018
BEST ANSWER: I don't think a small would work for your needs as the length would be too long, even tough it may be OK to fit around the jaw.
do you have medium?
A shopper on Jan 4, 2017
BEST ANSWER: Unfortunately the medium size is sold out until the upcoming season.
I need to buy 6 of the large defender fly bonnets but you only have small and medium listed. Where is the large?
A shopper on Mar 28, 2017
BEST ANSWER: Yes, this mask shows available in all three sizes: small, medium, & large.
do you have these in extra large?
Ellen M on Apr 13, 2015
BEST ANSWER: This item is only sold in S M and L, we do not carry XL sizng