The Berlin natural mattress from Berkeley Ergonomics is truly unique. Featuring a honeycomb-nested interactive European pocketed coil, this design has a long history of comfort and durability. From head to toe, the Berlin spring system alternates between a taller, larger-diameter spring and a shorter, smaller-diameter spring. The alternating rows of taller and shorter pocket coils adjust well to all body types and distribute pressure in a superior fashion to the typical method of pocket coil…