The layers
Top to bottom.
Five layers, each doing one job.
Bamboo cover
Zips off, washes cold. Bamboo wicks better than cotton and stays cool.
Gel foam, 3 cm
The first thing you feel. Soft, and it pulls heat away.
Memory foam, 4 cm
Takes the shape of your hip and shoulder so they are not pressing.
Latex, 3 cm
The bounce. It pushes back so you never feel stuck.
Pocket springs, 16 cm
Twelve hundred of them in a queen, each in its own sleeve, firmer in the middle for the spine.
Sleep on all five.
A hundred nights.