Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: How small does it pack down to in the sack?  Does it come with a compression sack?
Document: I have a down bag rated the same, but it would never pack down into a 7"x7"x12" stuff sack. Wow! Has technology ever come a long way since I was a Boy Scout! I remember hiking all day just to freeze my rump off that night in a bag that weighted three times as much and also four times the size. I've already recommended this bag to my backpacking buddy, as I would also recommended it to you!
It compressed down to a small bundle and fits in my back pack.When it is in its compression sack, it is half the size as the SleepCell (+25 deg-F rating) sleeping bags from Costco.I had slight issue with the zipper.
its not quite that small unless you spend an hour compressing it.But, Its small enough just by stuffing it into the compression sack and synching up the straps, I can fit this, with the rest of my gear into my 3000ci pack. So I really don't care if its half a pound heavier than the $100 bags.The compression straps are slightly different than the photo.
I love the price! It cannot be beaten. This bag doesn't pack as small as it would lead you to believe, but it is a very reasonable size for a synthetic bag. The compression sack that it comes with feels cheap and I fear that at some point in the near future, it will break on me. I'm taking it to the Grand Tetons in late June so I will update on how it holds up!
I have only been able to use this bag once, but it did fantastic. It is easy to pack since it compresses down so small; however, the only downfall I have found is the compression sack. It feels cheap, thin, and one thread away from ripping open (sack is the reason for the 4 stars and not 5). No problems from it yet. The bag itself is comfortable for its size and thickness and kept me warm.
Now me...6 foot and 275. Its like putting on my wifes socks. I couldn't pass on the price - Good thing I have kids to give it to. Zipper catches as mentioned in other reviews. Bag does easily pack up small as the photos show and you can pack it into the compression stuff sack by just stuffing it and it fits nicely. For a Scout, you cant beat the price and compactability. For a full size adult....look elsewhere.
The sleeping bag is fine, great for the value. I got it for an upcoming trip to South America as I wanted something that could pack up small. The size of the bag is a big small but so am I (5'3" petite female) so I fit fine; it just might be an issue for some. My problem is with the compression sack it came in-- as soon as I got it out of the box, I saw a rip in the fabric about three inches long.
Overall; Good, cheap, packs small, sleeps tall, 15 degree sleeping bag.I say 15 degrees given you're wearing layers, good sleeping pad and protected shelter off the ground.The compression sack makes this pack away real small. can be put in any 30L pack leaving plenty of room for other supplies for an overnight trip. same for lashing to your pack, can shoved in a typical 20L dry sack leaving spare space.No complaints about weight.No complaints over size.
I think this is an alright bag. Little tough to get into the compression sack though and as suggested by one of the reviewers, no need to roll it up (although it does come rolled when you buy it new), just stuff it in slowly one side at a time. In fact rolling it up will be extremely difficult to get it in the sack, I had to take help of a friend to insert the roll in the sack.
For the price, this bag is really a tremendous deal. It compresses to the size of a basketball which is still rather clunky in my opinion. Great for car camping. I wouldn't attempt to carry this in my pack though. I've taken it out in the Midwest spring, lows of 65, and had to leave it unzipped because it got too toasty. The compression sack is poorly made, but that's an easy upgrade. I've had far worse bags that have cost four times as much.
Answer: yes