Flexible foam (for mattresses) are usually made of _________________?
Correct answer: D. Polyurethanes
- A. PVC
- B. Silicone rubber
- C. Polyamides
- D. Polyurethanes
Explanation
Flexible mattress foams are usually polyurethane foams, whose low-density cellular structure provides cushioning and resilience. PVC, silicone rubber, and polyamides are not the usual materials for this application.
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