I make my own breathable ripstop nylon bags. Total weight of seven ounces for 5 and compress to nothing in my pack. (I keep it simple like a big stuff sack with heavy duty thread and reflective guy line for the draw cord)
TAG BOMB work great...but as mentioned...a little small for an x-large elk...I had to add one bag to get all meat on my biggest bull. I'd say they're plenty big for 80% of elk taken though.