I don't have a dry bag of that size handy, but judging from my measurements
the 50" circumference is just an approximate. The straps are very
accommodating and will adjust a significant amount. One thing I will tell
you is to be mindful of the loads you are putting on it. The top strap is
adhered to the back panel of the pack on the outside (the load side) so a
very heavy load is pulling against the seam where the strap is sewn. This
caused it to begin to peel from the back panel almost immediately for me.
However, I put a couple of goops of adhesive into the tearing seam and
clamped it tight overnight. That fixed the problem. I would recommend
doing this right away. (Also, hopefully NRS will read this and consider
sewing the strap to the inside, or the carrying side, of the back panel so
the load isn't fighting that one seem so much.) Good luck and I hope it
works out for you.
Answered on 9/11/2012 by Anonymous