OK, I've tried several masks, and I'm down to two. The Mares X-Vision Liquid Skin and the Atomic Frameless. Both are midsized models. Both fit much better than my old mask. The Mares fits me perfectly, like it was made for my face, but I absolutely love the view out the Atomic. I don't think it would be possible to get a better fit than I'm getting with the Mares. Period. But the Atomic... WOW! The field of view is better horizontally and vertically. Plus, the lens is closer to my eyes, and between that and the one-piece lens it makes the nose almost unnoticeable. I bought both with the understanding I'd return one of them. If I get them wet, I can't return them, so I'm left with dry fitting them. I'm certain the Atomic will seal better than my old mask, but... what would you do? Go for the even better comfort/fit of the Mares X, or the better view of the Atomic Frameless? I would buy the Atomic in a heartbeat, but when I strap it on, and exhale through the nose, the air exits at the temples. When I do this with the Mares, the air exits under the nose, so it would seem to be much better for clearing. Your opinions, please!