Marshall Mattress takes great effort to take a more balanced, sustainable approach to manufacturing. All the polyurethane foam we use is CertiPUR-US® certified, that is rated as Low VOC (Volatile Organic Compound) emissions for indoor air quality (less than 0.5 parts per million)). Similarly, no PBDE (Poly Brominated Diphenyl Ether) flame retardants are ever used. All box spring and foundation components are hand assembled with sustainable Canadian wood products. To date, all Marshall bedding is produced in a focused, non-piecework environment where the staff works together as a team to offer a great night’s sleep, one pocket coil mattress set at a time.