I have for our washing machine (about 106 kg), which tends to "jerk" at low spin tours on not perfectly flat concrete base bought this underlays. Practically, I realized that these mats are indeed nice and thick and soft, the device but rather escalates and even acknowledged during normal wash cycle each drum movement with a shiver. Alternatively, I had the right to charge the dryer on the mats, but also the 60 kg led to instability, since the mats are unique to such a point load too soft.
The packaging has also been stated that the mats is intended as a base for boardwalks or paths and is also suitable for inferiority of vibrating equipment, the latter only as a small note on the side of the packaging.
These little mats go back now, unfortunately, because they do not provide the advertised benefits here unfortunately.