Spinnaker is less forgiving than silnylon, in my experience. It can haved an almost brittle quality when under tension. Stitching can act like "tear here" perforations.

OYOH, I have a Spinnaker wallet that has had daily use for 3 or so years. It is really beaten up and should be replaced, but still holds money, credit cards, etc. My first aid stuff sack, made about the same time, is also holding up well. It is less beaten up, but normally rides untouched in my hanging food bag.

CM