quality assurance   Rigorous testing of all products in the laboratory ensures that they meet or exceed, stringent statutory requirements and conform to the highest possible standards. Ingenious tests have been devised to help simulate 10 years' product use and include the following: TRIANGULAR ROLLER TEST DURABILITY OF BED EDGE TEST VERTICAL IMPACT TEST IRON MAN TEST TRAMPOLINE TEST FLAMMABILITY TEST   Not even the heaviest heavyweight could punish our beds more than we do! A solid oak triangular roller is just one of the devices developed by the Silentnight Group to test mattresses to the point of destruction! The rollers repeatedly pound a mattress 20,000 times to replicate the many years of use one may expect from any of the Group's beds.