Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: Do the sizes refer only to the fins? Or mask as well? I have a narrow face, so I am trying to make as educated guess as possible.
Document: I purchased two of these for my spouse and myself to look at the reefs in the ocean. The snorkel works very well, even for beginner as there is a little more protection from water flooding in. The issue I had was with the goggles, the seal around my face wasn't not the best. While I was swimming in very swallow waters looking at the reef, water would flood the goggles making it very difficult to see. If your goggles flood at shallow reef waters, it very difficult to empty the water out while trying not to cut yourself on the sharp reef.
The mask seals on the face well  and the fins propel you through the water without falling off. Perfect for pool time!
This time in 4.5 feet of water, the pin couldn't be found.The fins are awesome and the snorkel worked well- based on 15 minutes of use. I did find a fix for the mask and am looking forward to trying it out. I picked up some small machine screws at a hobby shop, #4-40 X 1/2" long and some "Vinyl plug anchors" (for use in concrete, solid block and stone- found at my local Menard's store) Part number 233-1162 and size #4-6 X 1".
Even though it was a cheaper version of many snorkel gear, it worked fine for me and my husband. Although, I have to note that my sister and her husband bought the same ones and her face mask broke when she took it out of the package. But I guess 3 out of 4 isn't too bad! Definitely will bring them along again.
Eventually the mask wouldnt hold the strap tight around my face and would loosen. this was on the last day of the trip. I think less use or just one week of use would have been prefect for the set. Maybe the shape of my head worked against the mask sealing on my head, who knows but while out on the ocean i would have to raise up every 8min or so and drain the water from the mask and that got old quick. But for the price i paid I got all my money's worth.I think if I was going to make a thing of snorkeling i think a $100 mask would be my next purchase with better engineering thst helped the mask sealejen broke in.Other than that, that's all I got.
I purchase these because of the price point and that we are not professional snorkelers. But we were going to swim in the Red Sea and the marine life there is incredible! So I bought each family member one. The mask leaks water no matter how tight you adjust it to your face. I came up for air and to dump out the water from the mask. The fins and the mouthpiece worked fine.
I purchased this set in preparation for my vacation in St. John USVI. I used them to explore multiple reefs for multiple hours and have no complaints about them at all. at some points I had a very small amount of water come into the mask right beneath my nose but a quick adjustment cured that.I have two suggestions I would make to anyone purchasing this set. The first is to buy anti fog spray as well (after the first use the mask would tend to fog up. But all masks have that issue.
My wife purchased both a large and a medium kit for both of us to use on our cruise to Cozumel and the Grand Cayman Islands. Both sets worked great. On our second adventure, the check valve on the large set Seabreeze II snorkel breathing tube was apparently dislodged as water enters the breathing tube without restriction. I have been trying to order the replacement part but have not been able to make contact with either the manufacturer or Amazon.com. I am hoping this review will result in someone from customer service assisting me in acquiring the replacement part.PS: my wife's set is still working great and should get 5 stars.
good fins and snorkel , but the face mask will not seal if you have a mustache but if that is not a concern should be a great set
I purchased the US Divers Adult Cozumel Mask/Seabreeze II Snorkel/Proflex Fins with Gearbag in Black/Large and I'm very satisfied with the product. The bag is very decent quality and has a shoulder strap. The fins' foot pockets are among the most comfortable I've seen. I wear a US Size 10-11 (Euro 42-44) depending on the brand, so the Large (9.5-11) played right into that and the fins really fit perfectly. The snorkel's mouthpiece does NOT come off to replace the one on a second stage regulator for diving, which is among the reasons that make me want to say this should be considered more for snorkeling and maybe shallow scuba, than for scuba diving, but I think you are still getting A LOT of decent quality products for what you are paying.
Answer: yes