Orthopedic mattress with foam and viscoelastic core. The viscoelastic provides extra comfort and works as a thermoregulator, maintaining the ideal temperature for a good night's sleep. The foam core provides orthopaedic performance with optimal adaptation to the body, which allows an even distribution of pressure over the contact surface that reduces muscle contractures and improves blood circulation. The stretch fabric allows excellent breathability of the mattress and prevents the accumulation of dust mites and moisture.