Instruction: Output yes if the supporting document can answer the given question. Otherwise, output no.

Input:
Question: What size is AC exactly?
Document: tight seal and they don't not leak.
I loved these goggles to begin with, although I did think I was about to destroy them trying to change the nose piece over to the larger version. Unfortunately after not-so-long they did start to fog up, so I bought some of that chemical spit that stings your eyes so much you forget about how foggy the lenses are, mainly because you can't see anything with or without them at that point.That said, they are still my main pair of goggles and are very comfortable to wear.
Answer: no