... +PK felt, two layers to enhance the ability of deducing friction of the mattresscore/spring:pocket spring as the mattress core, 2 ... .0mm wire gauge, 5 turns, , thick 18cm.insulator:plastic blancing net +PK felt, two layers to ... suitable for the base,and have long used time. * One sided pillow top with Foam* ONE LAYER POCKETED COIL Φ2.0mm 5 TURNS* FOAM ...