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🐾 Protect your cat in style—comfort and defense that lasts all year!
Hartz UltraGuard ProMax Flea & Tick Collar offers 14 months of continuous protection with two 7-month collars. Designed for comfort with a soft, flexible, and breakaway design, it delivers slow-release active ingredients that kill and repel fleas, ticks, and their eggs. Adjustable to fit all cats, this collar ensures full-body protection without irritation, making it ideal for indoor and outdoor cats alike.









| Active Ingredients | Methoprene |
| Allergen Information | Allergen-Free |
| Brand | Hartz |
| Customer Reviews | 3.8 out of 5 stars 5,627 Reviews |
| Item Form | Collar |
| Item Weight | 1.74 Ounces |
| Scent | Unscented |
N**A
Very good product.
Using it really helps my pet; it prevents flea-induced allergies.
C**N
Product's performance
This is the best product we've found that literally works, under Seresto..much better price also..last just as long..as we tried Seresto also!! Very good 👍
L**C
Run away from this one
It’s not the old Harts quality. Doesn’t really work very well and on one cat it reacted and my cat lost all her hair under her throat. It was raw and pussy the vet and $700 later she is okay and bald underneath her neck
A**E
Convenient and affordable
The Hartz UltraGuard ProMax Flea & Tick Collar for Cats & Kittens is a convenient and affordable option for long term flea and tick protection. I like that the 2 pack provides up to 14 months of coverage, making it a cost effective choice compared to monthly treatments. The collar is soft, flexible, and easy to adjust, so my cat seemed comfortable wearing it. It did a good job helping reduce fleas, and I appreciate that it also targets flea eggs and larvae to help break the flea life cycle. The breakaway safety feature also provides extra peace of mind for adventurous cats. The only downside is that it may not work equally well for every cat, especially in areas with heavy flea infestations, and some pets may have sensitive skin. It's important to monitor your cat when using any flea and tick product and follow the directions carefully. Overall, if you're looking for an easy, long lasting, and budget friendly flea and tick solution, this collar is worth considering
O**A
Great products
Great product and the price.
S**A
I picked this brand because it was cheaper than the other
Why did you pick this product vs others?: I don’t think this brand is good as Sreto Sreto really gets rid of the fleas, but I still noticed getting bit by fleas with this Heart’s Brand even though I shampooed and vacuumed my floor. I’m still getting bit by fleas and both of my cats have this collar on it’s supposed to last for Six months or so. I know that Soresto does but to me I’m noticing that hearts doesn’t really work as well as Sreto.
M**N
Awesome! 4/23/26
This works very well for my cats. I have two indoor cats who got flea-ed up. After doing flea baths at home in the shower, I applied these collars as soon as the cats were dry. Haven't had any bugs, and no weird reactions. I prefer these collars because one cat is sensitive(drooling/seizures) to the drops on the back. If my cat starts acting wonky I can easily remove this collar and wash her down. I would recommend these and will keep buying!
J**N
Repel unwanted bugs from pets.
There are 2 kitties that were abandoned since 2024, they are now roaming the neighborhood since then and they like to sleep outside my porch and they made friends since then with my now deceased dog. I buy them collars every 6 months to make sure they’re not infested with ticks or lice. These were easy to put on.
Trustpilot
1 day ago
3 weeks ago