@holajuancho According to the REi catalog entry for the Trailbreak 20, it comes with a stuff sack. It is polyester fill, so it won't compress as much as would down, but it will compress. When you start stuffing , you would swear that it won't fit, but it will.
Of course, you can trust the solemn word of a complete stranger on the internet....
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it says it is slightly compressible from 20L down to 19L. Also fairly heavy at around 5lb. So if you have a large capacity backpack you could take it backpacking but it is clearly not ideal for that purpose. More typically 20 degree synthetic backpacking sleeping bags weigh in the 3 to 4 lb range and compress to around 10L.