For GS Mark (Tested Safety) certification, the Tripp Trapp® chair was tested according to various standards. One of these is a standard called DIN 68 878, which is a quality norm for adult chairs. This standard involves a dynamic test where 85 kg is placed on the seat, which is then tilted backwards 6000 times. The Tripp Trapp® chair passes all the tests in that standard, which means a load of up to 85 kg can be safely placed on the chair.