Since I sell helmets in my shop, I have always been somewhat confused by the various testing stamps I see on the helmets. SNELL, CPSC, etc. I understand that these are private testing labs that are paid to test helmets. I would assume that the cheapest testers get the largest volume of business. But at the same time, this makes me suspicious in regards to who has the most rigorous testing protocol. Does anyone know the breakdown of who tests the most strigently to who has the minimum testing procedures? And why was SNELL all of a sudden taken out of the picture? Cost or as one helmet rep contended, they didn't do a rigorous enough test to satisfy his company. Just curious.