Join Date: Nov 2009
Location: Lander, Wyoming
I purchased one about that size, with the pouch sewn on to the outside, with a double pull handled zipper (built in storage pouch), about 40 years ago.
It has slotted leather triangles stitched to the 'inside' of the storage pouch, so one of the tent/sleeping bag straps could carry it on the exterior of the large pack.
I used it to carry my 'Daily' fishing tackle/snacks/rain gear when I was Backpacking into the high mountain lakes.
I've still got it / still occasionally use it.
I'll bet you could still sell a million of them, at $6.95 USD!
Modify at "YOUR OWN RISK"!
Still riding my 1987 KL650-A1. 85,000+ miles & counting