I was looking at bags on the REI website and saw that Sierra Designs now has something called "Flex Technology". I thought to myself- sure sounds like Montbell. I took a look at the Sierra Designs website, and sure enough, in a very small font it says "Flex bags are manufactured under a license by Montbell". It's nice to have a second option for the stretch bags, although the unimpressive stuffed sizes for the Sierra Designs bags(as listed on their own site) don't make me want to run out and buy one. I figured it was worth mentioning on here, though.