1.  2.20mm diameter high tensile strength, tempered Spring Steel. (U.K Standards)

2.  20mm Bonded Foam on each side 80kgs.

3.  Netting Insulators on each side (origin Belgium)

4.  20mm density foam on each side 20kgs soft.

5.   High quality Belgium Quilted fabric  with Hycare, C.I.T.  against dust mites, fungi and bacteria.