These are the two harnesses people actually shortlist once they have accepted that a dog needs restraining in a car, and the gap between them is mostly money. The short version: if the crash performance is the reason you are buying, the Sleepypod Clickit Sport Plus is the one - a three-point vest with a broad chest plate, crash-test certified, in sizes up to XL. If the Clickit is more than you want to spend on a harness, the Kurgo Impact is crash-tested, has steel nesting buckles and includes the seat belt tether, and it is a real answer rather than a consolation prize.
We have crash-tested neither, and that is the whole point of this page. Nobody buying a dog harness can test one, which means every buyer in this category is really comparing disclosure - what each manufacturer publishes about the test it ran, at what speed, with what dummy, to what standard. That is a comparison you can actually make from a keyboard, and it is the one we make below. The broader field, including the third option here, is ranked on best crash-tested dog harnesses.
Where the two actually differ
1. The shape of the restraint
The Clickit Sport Plus is a three-point vest: the load path runs across a broad chest plate and through two points at the sides, with the vehicle belt threaded through the harness itself. The Impact is a padded-chest harness with steel nesting buckles that connects to the belt through an included tether. In practice the three-point design is the reason the Clickit costs what it does - it is trying to spread deceleration across the dog's chest rather than concentrate it at a single tether point.
2. What each brand publishes
Both brands say crash-tested. Sleepypod has built its whole identity on publishing its testing and is the brand most often cited when anyone compares this category seriously. Kurgo states crash-testing for the Impact and backs its gear with a lifetime warranty. Neither claim is something we verified in a lab, and there is no mandatory government standard for dog restraints in the United States the way there is for child seats - which is exactly why the amount a brand volunteers matters.
3. Sizing, and the ceiling
The Clickit is listed in sizes to XL, which is what puts it on our large-dog restraint page. The Ruffwear Load Up, the third pick here, is listed XS to L. Size on chest girth behind the front legs in every case, never on the weight printed on the box - a crash certification assumes the harness sits where the designer put it.
4. Does it work as a walking harness
This decides more purchases than crash data does, because a harness you have to swap at the car door is a harness that gets skipped. The Impact is a car harness first. The Ruffwear Load Up is the one that feels like trail kit and takes a daily walk without complaint. If one harness for everything is the actual requirement, read seat belt tethers and hiking versus walking harness before you choose - the dual-use compromise is usually a weaker car harness.
5. What is in the box
The Impact includes its seat belt tether. Check what ships with any of them before you order, because a harness plus a separately bought tether closes more of the price gap than people expect. If you already own a harness you trust, a standalone tether like the Mighty Paw is the cheapest legitimate upgrade available - but it only inherits the strength of the harness it clips to, and clipping any tether to a collar rather than a harness is how dogs get hurt.
Which one is wrong for you
Skip the Clickit if your dog is under about 15 lb and travels in a carrier anyway - a crate or carrier properly secured is the better answer at that size, and the money is better spent there. Skip the Impact if you specifically want the broad three-point load path, because that is the thing it does not have. Skip both if the dog genuinely will not accept a harness: a dog fighting a vest for two hours is a worse outcome than a secured crate, and crate versus harness walks through that decision properly.
The two, side by side on published specs
| Sleepypod Clickit Sport Plus | Kurgo Impact | Ruffwear Load Up |
|---|
| Design | Three-point vest, broad chest plate | Padded chest plate, tethered | Padded chest panel, tethered |
| Crash claim | Crash-test certified | Crash-tested | Crash-tested design |
| Hardware | Vehicle belt threads through harness | Steel nesting buckles | Strength-rated buckles |
| Sizes listed | To XL | Multiple | XS-L |
| Tether included | Check listing | Yes | Check listing |
| Doubles as a walking harness | Not its job | Not really | Yes |
The decision in four lines
- Crash performance is the priority, dog is mid-size or bigger: Sleepypod Clickit Sport Plus.
- Want crash-tested without the Clickit price: Kurgo Impact, tether included.
- One harness for the trail and the car: Ruffwear Load Up, accepting it is the compromise.
- Already own a harness you trust: add a tether, never clip to a collar, and re-check the fit.
What we would actually buy
The Sleepypod Clickit Sport Plus, sized on a tape measure around the chest, for any dog big enough that a carrier is not the answer. Buy the Kurgo Impact instead if the Clickit is genuinely out of budget - it is a far better outcome than an unrestrained dog, which is the real alternative most people are choosing between. Either way, pair it with a hammock so the dog cannot slide into the footwell, and read are dog car seats safe for why the harness and not the seat is the safety purchase.
