Flea And Tick Collars from Seresto
The #1 vet-recommended flea and tick collar delivers up to 8 months of continuous, mess-free protection — no monthly treatments, no greasy topicals, just long-lasting defense for dogs and cats.
- Kills and repels fleas, ticks, and flea larvae
- Water-resistant and odorless for everyday wear
- Vet-recommended, available in sizes for dogs and cats
Explore Seresto Flea and Tick Collars
Choose the right Seresto collar for your pet — precision-engineered for dogs and cats with the same trusted, long-lasting formula.
Seresto Collar for Dogs
Provides up to 8 months of continuous flea and tick prevention for large and small dogs. Odorless, non-greasy, and water-resistant for active pets.
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Seresto Large Dog Flea & Tick Collar | 2-Pack
Designed for dogs over 18 lbs., this 2-pack provides long-lasting flea and tick protection with two comfortable, adjustable collars featuring a safety-release mechanism.
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8-Month Duration
One Seresto collar provides up to 8 months of uninterrupted flea and tick protection — significantly longer than monthly spot-on treatments or oral preventatives that require regular reapplication.
Dual-Action Formula
Seresto kills existing fleas on contact and repels new fleas and ticks before they can bite. The low-concentration active ingredients are released gradually through the collar material and spread across your pet’s coat.
Water-Resistant Design
The collar remains effective after bathing and light rain exposure. Pets who swim or are bathed frequently can continue wearing Seresto without losing protection, though water exposure may reduce total duration.
Safety-Release Mechanism
The cat collar includes a breakaway safety mechanism designed to release under pressure, reducing the risk of injury if the collar becomes snagged during normal activity.
Odorless and Non-Greasy
Unlike topical treatments, the Seresto collar leaves no residue on your hands or your pet’s coat, making it a cleaner and more convenient option for daily wear and household contact.
Vet Recommended
Seresto is the #1 vet-recommended flea and tick collar according to data on file from Elanco Animal Health, making it a trusted choice supported by veterinary professionals across the country.
How to Review Product Information
Follow these five steps to get the most out of your Seresto collar and keep your pet protected all season long.
- 01
Choose the Right Collar Size
Select the Seresto collar designed for your specific pet — dogs are available in small (up to 18 lbs) and large (over 18 lbs) options, while cats use a single universal size. Matching the collar to your pet’s species and weight ensures proper active-ingredient distribution and a comfortable fit.
- 02
Remove Packaging and Unroll the Collar
Take the collar out of its sealed packaging and unroll it fully. The collar is stored coiled; allow a moment for it to relax to its natural shape before fitting. No activation step is required — the slow-release formula begins working immediately upon contact with your pet’s skin and coat.
- 03
Fit and Fasten the Collar Around Your Pet’s Neck
Thread the collar through the buckle and fasten it snugly around your pet’s neck. Pull the free end through the loop to secure the connection. Trim any excess collar length beyond a few centimeters to keep it tidy and prevent your pet from chewing or snagging the extra material.
- 04
Check Fit with Two Fingers
After fastening, confirm the collar is snug but not tight by sliding two fingers under it. If two fingers fit comfortably, the fit is correct. A properly fitted collar maintains consistent contact with your pet’s skin, which is essential for even distribution of the protective active ingredients across the coat.
- 05
Monitor Effectiveness and Replace at 8 Months
Seresto provides up to 8 months of continuous protection from a single collar. Mark your calendar with the installation date and plan to replace the collar on schedule. Check periodically for signs of wear, and note that frequent bathing or swimming may reduce the total effective duration slightly.
Flea and Tick Collars Reviews: What Pet Owners Are Saying
Pet owners consistently highlight Seresto’s long-lasting, low-effort protection as the standout reason they keep coming back.
Eight Months, Zero Fleas
We switched to Seresto after struggling with monthly topicals that felt inconsistent. The collar required no ongoing effort and our dog stayed completely flea-free through the entire warm season. Replacing it once every eight months is a game-changer for a busy household.
— Dog owner, large breed
Finally a Collar My Cat Tolerates
My cat is notoriously picky about anything around her neck, but she adjusted to the Seresto collar within a day. The lightweight design and lack of any strong scent made it far less stressful than other collars we tried. The safety-release feature also gave us real peace of mind.
— Cat owner, indoor-outdoor pet
Vet Recommended and Owner Approved
Our veterinarian recommended Seresto and we understood why the first time we used it. The collar is odorless, stays in place during walks and swims, and our two dogs showed no irritation after fitting. Having vet backing behind the product made the decision straightforward.
— Multi-dog household owner
See Seresto in Action
Watch how Seresto flea and tick collars deliver premium, long-lasting protection for your pet.
About Seresto
Seresto is a premium flea and tick prevention brand from Elanco Animal Health, one of the world’s leading animal health companies. Developed with veterinary-grade science, Seresto collars represent a commitment to giving pet owners a reliable, convenient, and clinically supported way to protect their animals from parasites year-round.
The Seresto collar range covers dogs of all sizes and cats, bringing the same trusted slow-release technology to every type of household pet. The brand’s focus on long-duration protection without the mess of topicals or the complexity of oral medications has made it the #1 vet-recommended flea and tick collar according to data on file from Elanco Animal Health.
Whether you have an energetic outdoor dog, a curious indoor-outdoor cat, or a multi-pet home, Seresto provides a straightforward, proven solution backed by veterinary professionals across the country. Explore the full range of collars and find the right fit for every pet in your family.
Visit Official StoreFrequently Asked Questions
How long does a Seresto collar last?
Each Seresto collar provides up to 8 months of continuous flea and tick protection. The active ingredients are released in low concentrations over time through the collar material, maintaining consistent coverage without any additional applications.
Is there a different collar for dogs and cats?
Yes. Seresto offers collars specifically formulated for dogs and a separate collar designed for cats. The dog collar comes in small and large sizes, while the cat collar is a universal size with a safety-release mechanism. Never use a dog collar on a cat, as the formulas differ.
Can my pet wear the collar while swimming or being bathed?
Yes, the Seresto collar is water-resistant and remains effective after bathing and light rain. However, frequent immersion or repeated bathing may reduce the overall duration of protection, so pets that swim regularly may need replacement before the full 8-month mark.
Does the collar have a strong smell?
No. Seresto collars are odorless, which is one of the features that distinguishes them from some other flea and tick prevention products. There is no noticeable scent on the collar itself or on your pet’s coat during use.
Who recommends Seresto?
Seresto is the #1 vet-recommended flea and tick collar according to data on file from Elanco Animal Health, the manufacturer. Veterinary professionals recommend it for its long-lasting, low-maintenance approach to parasite prevention across both dogs and cats.