Ensure Your Dog Is Safe in Your Car
The only easy-to-use dog harnesses successfully crash tested to the same standard as a child car seat.
Revolutionary Safety: The Two-Tether Advantage
Our two-tether system redefines safety with balanced force distribution. By working together, the tethers evenly spread the impact, reducing strain on your dog’s body and lowering the risk of injury. It’s a smarter, safer design that keeps your dog secure and protected in every moment that matters.
Revolutionary Safety: Total Control with Our Two-Tether System
We’re the only harness system that solves the problem of losing control when transitioning in and out of the car.
Our two-tether design allows you to securely attach your leash before unbuckling your dog, ensuring complete control and safety every step of the way.
Because They're Family
Car accidents are devastating, but every passenger deserves to be safe. With our innovative system, you can eliminate loose dogs inside or outside the car. Feel confident taking your dog anywhere, secured with just two clicks.
Lower Tether
The Lower Tether connects your dog’s harness to the child car seat anchors or seat belt receiver, keeping them secure during travel. Designed for crash-tested protection, it limits movement and reduces impact forces. Built with reinforced webbing and premium hardware, it easily clips in place for a strong, hassle-free connection every ride.
Upper Tether
The Upper Tether connects your dog’s harness to the seatbelt system, adding an extra layer of security. Designed for crash-tested protection, it helps control movement while allowing your dog to sit or lie down comfortably. Built with reinforced webbing and premium hardware, it adjusts easily for a secure, hassle-free fit.
Leash Converter
The Leash Converter allows any standard leash to securely attach to the Defender Harness, making it easy to switch between car travel and walks. It features our patented Optimus Buckles, exclusive to Crash Safe Dog, providing unmatched strength and security.
We know how fast other leashes wear out—daily use, tension, and strain take a toll quicker than most people expect. By using the leash you already own, the Leash Converter helps reduce waste and supports a more eco-friendly approach to pet safety. When it’s time for a replacement, experience our True Control Leashes Featuring our OmniLink—our next-generation solution built to handle it all.
Lightweight, strong, and easy to use, the Leash Converter adds convenience and flexibility to your dog’s safety system.
Defender Harness
The Defender Harness is the part of the Crash Safe Dog Harness Kit that goes on your dog. It works with the Upper and Lower Tethers to create a strong and secure system that helps keep your dog safe in the car.
Made for comfort and safety, it has a snug but gentle fit that spreads pressure evenly, preventing strain on your dog’s neck. Soft padding and adjustable straps ensure a secure, comfortable fit while still allowing natural movement. Tested to the same safety standard as a child’s car seat, it provides trusted protection for your pet. Strong webbing and high-quality buckles make it durable and reliable.
The Defender Harness is easy to use—clip a leash to either the front or back connection point for walks. Safe, simple, and built to last.
Trusted by Hundreds of Dog-Loving Families
Crash Warranty
If you're ever in a crash, we'll replace it for free. Free returns (if we ever get one!). Proudly made in Canada. 100% Satisfaction Guaranteed. Backed by our Safety Guarantee and Comfort Commitment.
Demo Video
Hi Dog Lover!
We understand—keeping your dog safe in the car shouldn’t be so complicated. Yet for years, pet owners have faced the same struggles: harnesses that break under pressure due to poor materials or designs, and systems so complicated that threading seatbelts feels like solving a puzzle.
At Crash Safe Dog, we believe your dog’s safety is non-negotiable. That’s why we make all our harnesses here in Canada, using the highest-quality materials and a design that’s as simple as it is effective. With just two buckles to clip in, your dog is secure, and your mind is at ease.
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Frequently Asked Questions
If you’re in an accident, we’ll replace your harness for free. Like car seats, our harnesses are designed for single-use safety during a crash to ensure maximum protection. Just reach out to us, and we’ll take care of the rest!
See here for more information on replacements and warranties.
Absolutely! Our gear makes a thoughtful and practical gift for any dog owner. Just select the size and options for their pup, and we’ll handle the rest. If you’re unsure about sizing, our team is happy to help!
1-year replacement or repair for manufacturer defects for all products.
We Ship to Canada and USA on our website and will ship worldwide! Just reach out if you're not there and we will get you a quote to get you your Defender Harness.
Being successfully crash tested means our harnesses have passed rigorous testing to the same standards as child car seats. This ensures they provide reliable protection in the event of an accident, keeping your dog secure and reducing the risk of injury. Our testing proves that we prioritize your pet's safety with the highest level of care and quality.
All our kits include a leash converter, allowing you to use any leash you already own with the harness.
We also offer several leash options to enhance your experience:
- Standard Leash: Features a foam handle and swivel connector to prevent tangling.
- Leash Link: Easily clips onto your belt or another leash for hands-free walking.
- Active Leash: Converts into a belt or handle, with elastic for hands-free active adventures like running or hiking.
Our harnesses are designed to keep your dog safe and comfortable, whether in the car or on the go!
The Crash Safe Defender Harness Kit is a serious piece of safety equipment, not just a harness.
Handcrafted in Canada, the Crash Safe Defender Harness is designed and tested to the same safety standards as child car seats. We sew and assemble each component with precision and strength, using high-quality materials that ensure durability and reliability in a crash. Unlike mass-produced harnesses, every detail is built with safety in mind—from our patented Optimus Buckles to the reinforced stitching that holds up under real crash forces.
Investing in a truly crash-tested system means giving your dog the same level of protection you’d want for the rest of your family—because when it comes to safety, cutting corners isn’t an option.
We sell a bag specifically designed for washing the harness, but you can also use your own. Simply place the harness inside, wash on a gentle cycle with mild detergent, and air dry.
Our harness is successfully crash tested, easy to use, and made in Canada. Unlike many harnesses that rely on plastic buckles and weak stitching, our design prioritizes safety with high-strength metal components and reinforced webbing. The patented Optimus Buckle system is engineered for durability and real crash protection—meeting the same standards as child car seats. We avoid plastic where it matters most, ensuring our harness holds up in extreme conditions and high-impact scenarios. Designed for both safety and ease of use, our system is simple to put on, adjust, and secure in any vehicle.
