A whole lot of room
There's quite a bit of space in this roll. This gives you a lot of options and those are always good to have. So far, I've managed to fit a 10x13 tarp, a dozen tent stakes, a spool of paracord, and a small med kit in this roll. That's not likely to be the final or only load out though. It docks perfectly underneath the MCC which is very convenient. The material is the same as the MCC so it will hold up to heavy use. Worth the money if you're looking for an easy way to increase carrying capacity without adding too much bulk.