Berkeley; Leggett & Platt S Special Production Honeycomb Array Spring System İs Supported By A Double Layer Spring Of 15 Cm Nested Spring And 8 Cm Calico Spring. This Special Arrangement Of The Bow Allows Your Muscles To Relax While Not Allowing Your Sleep To Be İnterrupted. The "Active Support" System Available İn Calico Springs Responds Exactly To Your Body S Movements And Provides You With Full Support Against Gravity İn Your Sleep. İn İts İnner Layers, Which Are Prepared Only With Natural Materials; İt Contains English Wool, Organic Cotton And Natural Latex From Rubber Wood. The Superior Moisture Control Of These Natural Layers Balances Your Body Temperature During The Night And Offers You The İdeal Sleep Environment. Cotton Bags Have 28% More Air Permeability Than Their Counterparts With Their “Sleep Cool” Feature, Keeping The Temperature And Humidity At An İdeal Level. Berkeley Mattresses Are 31 Cm High.