1- A layer of high-quality synthetic fibers (double net).
2- A layer of 400g / m2 fiber weight for the winter face or 350g / m2 cotton for the summer face.
3- An insulating layer of plasticine weighing 20 g / m2.
4- A layer of high density sponge, 60 mm thick.
5- A layer of heat treated felt.
6- High-density sponge sides on the four sides of the mattress.
7- A steel collar (fram) around the spring net.
8- A network of high-quality and heat-treated springs, number 108 / m2.
9– A layer of 100% cotton 1cm thickness (summer face)