What type of foam material is folding foam bed made of?

All the foam cushions, sleeper chair folding foam beds, trifold and portable folding mattress lounger are filled with 100% polyurethane foam:

Firmness:  Medium.

Foam ILD (Indentation Load Deflection):  36.

Density:  1.8 Pounds per cubic foot.

Certification:  CertiPUR-US.