LGA Certification is administered by TÜV Rheinland AG, a global provider of technical, safety, and certification services with headquarters in Cologne, Germany. The test checks the compliance of the mattress with DIN EN 1957 standard. DIN EN 1957 standard deals with functional performance for domestic use of a mattress. The test is conducted by putting a 1400 N (roughly 150 Kilos) force on the mattress and stroking the mattress for 60,000 times. This test is meant to simulate, more than adequately, the normal domestic usage of a mattress. The above test is conducted to rate the mattress in four categories: Change in height of the mattress Change in hardness of the mattress after 30,000 strokes Change in hardness of the mattress after the test Change in resilience factor of the mattress

LINK : https://www.tuv.com/thailand/en/lga-tested.html