I did not realize that they do not have any gasket when I purchased them, but I was willing to give them a try anyway. They are like swedes, and rely on your face for the gasket action. For me, they just did not find a sweet spot for keeping out the water. I think that an improvement would be to incorporate even a thin silicone gasket material (similar to the speedo socket rocket) to enhance the fit, and cut down on leaks. Im not sure what the performance would be like if they did fit me, so I gave them a middle of the road '3'. I think that I may try the Energia to see if a larger profile goggle may have a little more hydrodynamics built into it than the standard mask triathlon 'goggles' which abound at triathlons. For now, I think that Ill have to stick to my speedos...they don't leak too badly yet.