The 90 series bag seems to only come in Xlarge , not for nothing is it known as the bouncing bomb. They are roomy , made for squaddies to zonk in in full kit , on weekends away I can stick my rifle in mine and still have room for me. Mine has a split in the foot end and this reveals the filling which appears to be some sort of quilting material rather than the hollofil or similar I would expect. Not the warmest bag in the world either , I went camping with the kids early this year ( in a tent :yikes: ) and I was chilly until I climbed into my bivi bag as well , the kids however were fine in their £20 argos bags