I like diving with this Scubapro frameless mask but I had a significant fogging problem with it on the first three dives I took when using it.I'm an experienced diver having completed over 80 dives. I know how to prepare a mask so it won't fog up. Every method I tried with this mask was not successful for my initial dives.I washed the mask before using it with dishwashing soap. Just before my first dive I sprayed the inside of the mask with a well known scuba dive anti-fog product and rinsed the mask quickly. In doing so, I found that the anti-fog spray congealed onto the mask glass rather than spreading out. Clearly the mask still had residue on it that affected its performance.By repeating the process I was finally able to enjoy my fourth dive of the trip without enduring a fogging problem.Scubapro does not provide any instructions with their product or on their website for proper preparation of the mask's glass surface before using it.Scubapro should ship their masks already cleaned and prepared.The plastic storage case for the mask has small clips on it to keep it closed. Both of them broke already.I bought a frameless back in 1996 for scuba diving and was very disappointed.This mask is very low profile and allows the bubbles from your regulator to float up in front of your eyes where a higher volume mask sits further away from your face and the bubbles tend to hit the bottom of the mask and float up along the sides.I ended up getting into free diving later and used this mask exstensively for years. As I said this mask is very low profile and gives an unbeatable view with its single lens that sits real close to your face. Extremely comfortable and durable. I put single vision prescription lenses in my old pair and now that I'm almost twenty years older I had bifocal lenses installed in my new mask. I love this mask.I had this mask years ago. I lost it over the side of the boat. It was the best mask I have ever used. I bought a VU to replace it, and it was fine, but recently started to hurt my head above my eyes. I also have a mask from another brand that is very comfortable, but I would rate it just below this mask. Maybe because of preference, but this mask offers great visibility, and when cleaned with toothpaste, and of course saliva right before you dive, this mask has rarely fogged on me. Getting this mask again was like finding an old friend. You cannot go wrong if you purchase this mask.This is a great mask if you have a moustache. If the tech divers like it, there's usually a reason. What makes the difference is that the mask doesn't simply rely on its flat skirt to make a seal against your face, but the lower part has a ridge that forms a tight seal, especially under the nose and along the cheekbones. This is the first mask I've tried that doesn't seep. It really conforms to your face. As with all masks, your mileage may vary, since no two faces are alike. But as for me, I wouldn't dive anything else.Love itLeaks under the nose in less than a foot of water. I thought it was because I have a beard and mustache, so I shaved it all off with the same results. It doesn't matter how tight I ratchet down the straps, this mask leaks under the nose in less than a foot of water. Also, I don't know what kind of silicone coating the manufacturer is using, but I have scrubbed the glass at least a dozen times to reduce the fogging; makes no difference whatsoever.17 years of diving, and being on a professional Underwater Search and Recovery Team, this is an absolutely amazing mask. I would never, never, and never, wear anything but this mask in a recreational environment. It's comfortable and slim. This is my second one, and replaced one which got used up. I will always use this mask.I have used this mask for years. I have over 30000 dives and this is the best mask I have ever used..Maschera subacquea di ottima fattura. Pochi riflessi, non si appanna, permette di avere un buon campo visivo. Prezzo adeguato alla qualità.transazione secondo il previsto, consegna perfetta, ma il prodotto ha manifestato un problema, appena aperto l'elastico della maschera di è rotto, cosa che non doveva accadereNe ho già un'altra e mi trovo benissimo. Consigliatissimatrotz Bart dichtet die Brille super ab. Bis -20m bereits getestet und sehr zufrieden.spedizione veloce,articolo perfetto