Mattress Firm Luxurious material description VIP type: 23cm thick 1.Belgium natural silk fabric 3.Hot-pressed pad 4.Nine-zone independent bag spring 5.Hot-pressed pad 6.Eco-friendly coconut fiber 7.Belgium natural silk fabric This Mattress Relatively hard, spine protection (about 23cm thick) Feature: Applicable for children, the elderly, and adults with poor waist. The mattress is relatively hard to protect the spine. 3E coconut fiber mattress is compressed from natural coconut fiber under high temperature, no formaldehyde, giving you healthy sleep.