I don't remember the name brand , but the $2.50 pillows from Wally's fit all of my NX-250 pockets just fine. They fill the pockets to the point that they sealed against each other and didn't leave any uninsulated surface exposed. I also sewed some down the middle then cut them in half. They opened the pocket up nicely for dead air space and still left room to stow gear. I had the lower portion of a z-liner on the foot to complete the package. I think this would have taken me comfortably thru some very low temps. All 6 of the full sized pillows fit into a standard compression sack but this is still mostly a car, canoe, or pulk sized ( thank you Bradley) set up.