.To all stomach sleepers, you will fall in love with this 10 inch pressure relief mattress with smaller springs that provide less bounce to comfortably cradle your body while at rest. The foam is CertiPUR-US Certified so it's free from heavy metals, phthalates, BPDE, formaldehyde and has reduced VOCs so you can rest easy knowing your indoor air quality won't be compromised. Pocket springs provide support by filling in the gaps of your sleeping form while allowing airflow through the mattress, creating a cooler sleeping surface.