Three densities, one pressure line
The inner foam controls the acoustic volume, the middle layer follows movement, and the contact layer spreads the remaining pressure.
Treating those jobs separately makes the cushion calmer and lets each layer age at a predictable rate.
A carrier you cannot misalign
The keyed magnetic carrier only lands in one orientation. Removal takes seconds and alignment does not depend on a hidden adhesive strip.
That small piece of legibility is what turns replacement from a repair into normal ownership.
Longevity begins when disassembly stops feeling forbidden.
