Fit and safety
The Gemnye seat is a containment and comfort booster. It elevates a small dog so it can see out, keeps it out of the footwell and off the driver's lap, and gives it a defined space that reduces travel anxiety. It is not a crash restraint, it holds no independent certification, and no booster seat of this type holds one.
Two measurements decide whether it fits: your dog's weight, and the length of its back from collar to tail base with the dog standing.
The Fit Ruler
Two numbers decide it. Neither of them is your dog’s breed.
Weigh your dog, then measure the back from collar to tail base with the dog standing. Enter both numbers. The verdict is one of three, and it always tells you which number caused it.
1–45 lb. Limit not yet confirmed.
6–26 in. Limit not yet confirmed.
The fit tool returns when the manufacturer confirms the weight limit. The figure we published before came from marketing images rather than the specification sheet, so we have withdrawn it rather than repeat it.
Why a tested harness belongs alongside this seat
Independent certification in this category comes from one organisation. The Center for Pet Safety is a registered 501(c)(3) non-profit, founded in 2011, and it states that it takes no funding from pet product manufacturers. It runs the only certification programme for pet travel equipment in the United States, and it publishes the results.
That programme covers three categories: safety harnesses, pet travel carriers and travel crates. Booster seats are not one of them. No booster seat of this type has passed it, this seat has not been submitted to it, and there is no test in the programme that a booster seat could sit.
So pair the two. Buy the harness from the organisation's own list rather than from us — the list is short, it changes, and it is theirs to keep current, not ours to reproduce.
Center for Pet Safety — the public list of products that hold it
What that harness does, this seat does not do. The seat gives the dog a defined place to be and keeps it out of the footwell and off the driver. The harness is the part with a test behind it.
Where the seat goes
On the back seat. Never the front, and never anchored to the centre console.
The front is ruled out by the passenger airbag. Florida's Department of Highway Safety and Motor Vehicles tells drivers that a rear seat is the better place for any child restraint, and that a deploying passenger airbag would crush a rear-facing seat installed in front of it. That guidance is written about children, not about dogs, and the agency says nothing about either dogs or this product. The mechanism is what carries across: a booster raises whatever sits in it and moves it nearer the dashboard, into the space the airbag fills.
This holds whether or not the airbag can be switched off, because the switch is easy to forget and forgetting it is not a recoverable mistake.
The centre console is the other position to rule out. A seat anchored there puts the dog level with the gear selector and inside the driver's arc of movement.
How to tether
To a harness. Never to a collar.
A tether clipped to a collar puts the whole load on the neck. A harness spreads the same load across the chest and shoulders. This is the most commonly ignored instruction in the category, and the reason is ordinary: the collar is already on the dog, and the harness is one more thing to fit before setting off.
Run the tether through the harness point channel and shorten it until the dog can sit, stand and turn round without reaching the front of the cabin. A tether long enough to let the dog reach the driver is doing half its job.
What the law requires
Restraining a dog in a car is, in most of the United States, not a legal requirement. Of the 51 US jurisdictions, 35 have been read against their own official code and none carries a general requirement to restrain an animal in a moving vehicle. Carrying a dog in an open truck bed is restricted in eight of them.
Dog restraint laws by US state sets out all 51 jurisdictions, with the statute cited and linked in every case where one exists, and says plainly where the official code could not be reached.
Sources
Read 21 August 2026. Each links to the page it came from.
- The certification programme for pet travel equipment, and the current list of products that hold it — Center for Pet Safety
- Air bag warning for children — rear seats, and rear-facing restraints in front of a passenger air bag — Florida Department of Highway Safety and Motor Vehicles
- Restraint law in all 51 US jurisdictions, each cited to its own official code — Dog restraint laws by US state
Reviewed twice a year, and whenever a cited page changes.