pillowtop: 3cm high density foam

insulator:plastic blancing net+PK felt, two layers to enhance the ability of deducing friction of the mattress

spring: pocket spring as the mattress core, 2.0mm wire gauge, 5 turns, , thick 18cm.

insulator:plastic blancing net+PK felt, two layers to enhance the ability of deducing friction of the mattress

height: total height is 25 cm