Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: Will these fit inside snorkel fins?
Document: These fit perfectly and allow my fins to stay on during my dive. I struggled to find fines that fit, these fit nicely inside of my Cressi fins!
Based on other reviews, I bought a size smaller than what I normally wear. I wear size 8 in regular shoes, and bought size 7 for these boots. My toes do come almost to the tip, but that's okay because the neoprene is so soft and stretchy. I wear these inside my adjustable, open-back dive / snorkel fins to keep my feet from rubbing inside the fins and getting sore spots.
They're a perfect fit for open heel fins and tropical diving. They're comfortable and rugged. Only drawback is no drain holes. You have to remove them to drain the water..
Great dive boot. Used with my open foot fins. I wear a mens 10.5 shoe and ordered the size 10. Fit well. Snug and comfortable. saved my foot when I steppid on a piece of glass while coming out of the water, so well worth it just for that. The soles are not rigid. They are quite flexible.
This pair of dive booties seem to be pretty well made. I purchased these for warm water diving and snorkeling. I always cringe a little when I buy shoes online, because sometimes a company's idea for a shoe's size is not what the general market is. These fit perfectly and are comfortable. They've protected my feet from my fins, as well as holding up on some pretty gnarly rocks. after a month of use, I've had no problems with them.
Good warm water boot and I have little doubt they will last. The hight is perfect with my fins. I tried the Oniell reactor first and it was just too low cut.I'm more writing this concerning sizing. Everyone says they run big, so wearing a 12 wide or 13, I ordered on the smaller end at a 12. They were still a full size too large. I swapped them for an 11 and they fit like a glove.
Didn't try them with fins but I'm sure they will work fine. Would recommend these booties.
Bought these to wear while diving with my fins and on the boat and these performed as expected.In and out of the water they were comfortable and practical.
If you're looking for protection from your open heel fins, this will do the job. Great for warm waters, specifically the Caribbean.
Great for the tropical waters when you need the boots for your fins and as beach wear....Would suggust for anybody.....
Answer: yes