Soft but not slumping step ideal sitting sensation New upgraded filling system, Creamy Violet sponge + pure taste high resilience bamboo charcoal sponge, gold matching, soft but not collapsing! Deodorizing + Strong support net taste high resilience bamboo charcoal sponge Bamboo charcoal sponge is a new environmental protection material, high density and high resilience to provide a strong support, while bamboo charcoal particles can effectively decompose odor, purify indoor air, absorb moisture, reduce bacterial growth.