... very smooth and soft.2) Innerspring base use high manganese steel wire ... mattress: Bonnel spring mattress, continous spring mattress, pocket spring mattress, foam mattress, nature latex mattress, memory foam mattress, fireproof foam mattress, pillow top mattress, home mattress, hotel mattress, hospital mattress. The mattress ... from the beginning.3) Every mattress qualiy checked before packing.4) ...