... BS5852 & USA CA117FR) A, Hight-density foam- D30/35 B, Fibra 16A4.Inside materials:(1) Sponge: fireproof high density(2) Frame: commercial ... grade made of kiln-dried solid wood(3) Spring: no-sag sinuous spring5.Packing ... and wrapped in plastic bagB.Plastic bag, foam, carton board, wovev bag, more sponge for corner add legs, or according ...