How it’s made

The build, in our own names

Four ideas show up across the range. They are specifications, not slogans. A mill has not been assigned yet — the names below are what that mill will be asked to hit.

Comfort that answers heat

Meltcore is the comfort foam. It softens where you are warm and heavy, and it is less eager to soften an inch away. That is the whole trick, and it is an old one. We do not pretend it is new physics.

A core that can breathe

Coilwell is a field of steel coils, each in its own fabric pocket. Harbor, Loom, and Current use it. Drift does not, because some people want the quiet of foam more than they want airflow.

Heat needs a door

Airveil is the open knit on the cover. Dewlayer, used on Current, sits just under that cover and draws heat off the surface toward the coils. Neither one refrigerates a room.

The middle should not hammock

Zoneband is a firmer insert through the lumbar of Loom. Quietseam is the quilting pattern that keeps the panel from tugging when the person beside you turns.

Materials we are willing to use

A mill may propose equivalents. These are the families we will accept in a Thaw spec.

Meltcore comfort foam and a denser base foam
Pocketed steel coils
Open-knit cover cloth, cotton ticking where a sheet set needs it
A waterproof membrane only on Keeper, never as the face of a mattress

Fire, foam, and certificates

Covers and foams must meet the flammability rules of the country on the label, including the UK furniture fire-safety rules where that market requires them. CertiPUR-US and OEKO-TEX Standard 100 are the criteria we specify toward. Thaw does not yet hold those certificates. Badges on this site are marked pending.