Designed to be easy enough for everyday use
Put on the Harness
The Defender Harness is worn like a regular walking harness, so your dog stays comfortable and secure before you even get in the car.
Connect the Tethers
Attach the Lower Tether first to keep your dog stable in the seat, then connect the Upper Tether to the seatbelt to engage in the event of a crash.
Drive with Confidence
Your dog stays secure on every ride, while still able to sit or lie down naturally, so travel feels calm, controlled and comfortable.
Defender Guided Fit Package - Complete Vehicle Safety Setup
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Complete system included: harness, upper tether, lower tether, and Leash Converter
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Successfully tested under the same dynamic sled test conditions used for child restraint systems.
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Two-tether design helps secure your dog in the vehicle
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Made in Canada by Optimus Gear
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Canada & U.S. Shipping Included
60 Day Fit Guarantee
Try it at home and make sure it works for your dog.
If it is not the right fit, you can return it within 60 days. We will cover return shipping for Canada and the USA.
We will also work with you to adjust sizing or setup before you need to return it.
[View full return policy]
Crash Replacement Guarantee
If your harness is ever involved in a vehicle collision, we will replace it.
We will also cover shipping both ways.
We may ask for a few details about what happened so we can continue improving the system.
[Learn more about our crash replacement guarantee]
Shipping information
Canada & U.S. Shipping Included
Defender Harness System orders now include shipping across Canada and the United States.
U.S. orders over $250 USD qualify for free shipping, including DHL Express when available at checkout. We prepare the required customs documentation for eligible Canadian-made products to help support a smooth border crossing.
Premium safety gear deserves a premium delivery experience.
Description
One complete system. One price. Personally reviewed before we build.
The Defender is more than a dog harness. It is a complete in-car safety system designed to help your dog ride more securely, comfortably, and confidently.
Every Defender Guided Fit Package includes:
- Defender Harness
- Upper Vehicle Tether
- Lower Vehicle Tether
- Leash Converter
After you order, we personally review your dog’s measurements, vehicle setup, riding position, colour choice, and optional embroidery before production.
If something looks off, we contact you before we build.
That means no package confusion and no sizing guesswork. We help confirm the important details, then build your system for the way your dog actually rides with you.
Included with Guided Fit
- Complete Defender system
- Guided Fit review before production
- Vehicle setup guidance
- Size and colour, confirmation
- Post-delivery fit check
- First Ride Setup Guide
- Safe Ride Circle membership
- Personal Safe Ride Code
- 10-Year Guided Fit Care Support
- Lifetime Crash Replacement
Most Guided Fit orders ship within 7 business days after fit confirmation.
The First Ride Confidence Promise
Before production, we review your dog’s measurements and vehicle setup. After delivery, you can send us fit and setup photos for a personal follow-up check.
If something does not feel right, we will work with you directly to review the fit, adjust the setup, and help make it right.
Because a safety system should not leave you wondering.
Why every size is the same price
Guided Fit is not priced like a regular dog harness.
You are investing in a complete vehicle safety system, personal fit review, setup support, Canadian-made production, and long-term guidance.
No package confusion. No sizing guesswork. Just the complete Defender system with personal support before we build.
Built in-house because it had to be.
We couldn’t find a manufacturer equipped to build the Defender System to the standard we needed.
Over 100 individual steps go into every Harness System.
That’s why we manufacture in Canada
using high-strength webbing, custom aluminum hardware, and durable Cordura in our own small-batch production facility.
What size does my dog need?
You do not need to choose a size before ordering.
After purchase, we will ask for your dog’s measurements, riding position, and vehicle information. We personally review everything before production and contact you if anything needs clarification.
The size option appears as “Fits My Dog” because your dog’s final size is confirmed through Guided Fit before we build.
What if the final fit is not right?
After your Defender arrives, you can send us photos for a personal fit and setup check.
If something does not feel right, we will work with you directly to review the fit, adjust the setup, and help make it right. Your purchase is also protected by our 60-Day Fit Guarantee.
What if I get in a crash?
If your Defender Harness is involved in a vehicle collision, we will replace it at no charge.
We cover shipping both ways and may ask for a few details about what happened so we can continue learning and improving the system.
Even a minor collision may qualify. The harness is designed to manage force during a crash, so we do not want you continuing to use equipment that may have been compromised.
Why aren’t the crash-test videos available?
The Defender was tested using canine surrogates owned by the independent testing facility. We do not own the rights required to use that footage for marketing.
As we continue developing and testing the Defender, we plan to produce testing footage that we can share publicly.
Why the Defender Harness over everything else out there?
The Defender was created because we could not find a system that combined meaningful crash testing, everyday ease of use, comfort, and direct personal support.
Here is what makes it different:
- The Defender was successfully tested under the same dynamic sled test conditions used for child restraint systems.
- Its two-tether design connects quickly without requiring you to thread a seatbelt through the harness for every ride.
- Your dog can remain connected while moving between the vehicle and leash, giving you better control during loading and unloading.
- Every system is made in Canada using durable materials, custom aluminum hardware, and small-batch production.
- Guided Fit gives you personal sizing and vehicle-setup support before and after delivery.
The result is a complete vehicle safety system designed to be practical enough for everyday use.
Still have questions?
You can speak directly with Andrew about your dog, vehicle, fit, or setup before ordering.
We make the Defender in small batches and want every customer to feel confident using it. Call or text us and we will help you determine whether it is the right solution for your dog.