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: I have the kelty cosmic 20 in the extra long size. What is the smallest size compression stuff sack that this sack will fit in. I will be using it ka
Document: I bought a couple of these for my wife and I. We had recently purchased the Kelty Cosmic 35 Synthetic, which is a nice light bag, but comes in a non-compression sack and I needed smaller. I purchased the SMALL size, and I wasn't sure it would fit my bag, but it did! And the size when compressed down was pretty amazing! Yes, the bag is nice and wrinkly when you take it out, but that is a price I am willing to pay for the size.
Since the last time I bought Kelty stuff sacks they added a smaller size. The sack I was replacing was a small but with the new measurements the old small is the new medium. I got it and tried to fit my sleeping bag inside no such luck then I held the two sacks up together and realized the difference! No problem for me though who wouldn't want an extra stuff sack around! Great product I also got the medium in the new measurements for my bag. I love Kelty!! !
This stuff sack from Kelty is well made and durable. It packs pretty small. I haven't had a problem with the straps breaking or anything yet. The material doesn't feel too thin. It does feels real strong. I have a Sierra Designs Verde 20 in long length and I was able to stuff it in with no problem. It stuffs well and I could probably have cinched it down pretty tight but didn't wanna run the risk of breaking the straps.
I received this sack this week from Amazon, and used it to pack a Kelty Cosmic 65 regular. Despite only moderate cinching of the straps, the seam around the top literally split open. It's a good thing I decided to test this before actually using it, because there is clearly a significant manufacturing problem when the seams on a compression sack can't withstand even a single use.I can only advise other people to search for a compression sack from a different manufacturer.
Do not go off of the size chart listed on the manufacturer's website. Always get one size bigger. I have a REI ZEN sleeping bag (long version) and even though I measured and purchased a compression sack that was listed to fit it, it would not. I had to go one larger. Other than that it worked flawlessly for a 3 day backpacking trip. Before the compression sack my sleeping back took up nearly all the space in my internal frame pack.
At 3.7 ounces this compression sack works great for sleeping bags or clothing. Stuffed a Kelty Cosmic 20 in here with a coolmax liner and still had room. Compression feels good... no seam or strap popping. Stays compressed in a moving backpack quite well. Does not create oval shaped holes in the seams when under heavy compression. Waterproof trash compacter bag inside or outside makes a nice waterproof(Dry-Sakish) sack.
To be fair to the manufacturer, I have only filled this with my sleeping bag one time and am using it mostly for long term storage.However, that being said; I rated this sack neutral primarily because of the apparent strength of the compression straps. The end panels are fairly light nylon and the straps are secured to it only with about a 1&#34; wide stitch. While this worked fine for me, and would probably be fine for limited usage; I foresee problems with heavy usage.
The product was great and sturdy and I had no problems the first few times we used it. However, we found the medium size was too small for the "Kid" size mummy bags we have that are also made by Kelty. It fit, but it was tight and I was worried eventually the wear would break the sacks. I just ordered the large size so hopefully my kids can stuff the sacks themselves!
I purchased the XL Size and one of the straps ripped off the sack after using it once for about 10 minutes. Very disappointed with my first Kelty product.
My kelty Cosmic 0 fits in this,  its tight but it compresses down good. Any larger bag would not fit.
Answer: yes