02-03-2016, 23:42
I recommend the kangzhu cups. I am skin and bones and in my experience I got the NB contoured cups (without the foam rings). They where painful in my ribs and left bruises from the cup. I don't experience that with the kangzhu cups. If you are sure you want NB cups get the foam rings. I switched because I had to get smaller cups anyway. I couldnt keep suction with the large NB domes.