Ok the adventurer's sash showed up in Pathfinder Chronicles: Seekers of Secrets.
It states that it weighs 3 lbs. but I don't see anything that list how much it can hold. Does any one know?
belt pouches can hold 200 coins. A familiar satchel can hold a tiny animal. So 4 lbs per pouch [24 lbs] + maybe 15-20 lbs for a tiny animal.
Actually most mundane containers do not state how much they can hold. Why would this be any different?
Nope. the item does nothing over holding things in your pockets. And take up half a kitsunes carrying capacity. Looks cool though.