The BIG pocketed spring mattress (height 30 cm) consists of 7 comfort zones, a double layer of pocketed springs of 600 springs per m2. The mattress has a comfortable layers of cold foam that provide high resilience support and keep you cool while you sleep. These unique layers allow heat and humidity to escape through custom channels beneath you. The DOUXE Mattress is designed to provide exceptional sleeping comfort and used in many four and five star hotels. Available in various firmnesses to fit your sleeping posture and personal preference.