Havnby CloudCore Review: One Mattress, Four Teslas

Havnby's catalogue is really one argument — foam beats air for sleeping in a car — made at three price points. The CloudCore is the accessible version of that argument, and the only mattress in our ranking with variants for every Tesla you can currently buy.

The range coverage

Model S, Model 3, Model X, Model Y — each with its own variant matched to the model and year, not a universal shape with instructions to make do. For S and X owners this effectively decides the purchase: nobody else in the field builds specifically for those cars. Model 3 owners have the Snuuzu's 18 cm version and TESMAT's offerings to weigh; S and X owners have the CloudCore.

What it doesn't do

There's no slope-levelling here — the CloudCore is a flat foam mattress on a floor that isn't quite flat. Havnby's own store feedback (4.9 across 53 reviews at the time of checking) suggests most buyers are happy anyway, which tracks: enough foam thickness absorbs most of the incline for most sleepers. The people who notice are the reason the FlatCore exists.

The verdict in context

At $399, the CloudCore sits third in our Tesla mattress ranking — dependable foam comfort and the widest fit coverage in the field carry it, even without the FlatCore's party trick. And reframe the question as best mattress for a Model S or X, and it simply wins by default.