Another new bit of gear I got is a "SaberCut" pocket chain saw.
It's a 24 inch chain with bi-directional teeth built-in and flat nylon handles on each end. You wrap the chain around the thing you want to cut and pull back and forth to cut it. It comes in a nylon pouch with a belt loop and a buckle closure. The pouch feels a little flimsy but it's not as if some super sturdy pouch is really required for an item like this so it does the job just fine. I should also mention the slight detractor that the nylon handles can sort of hurt your hands if you're pulling really hard, but if you've got some climbing or gardening gloves to give your hands a little extra padding that helps.
I keep mine strapped to the bottom of my right-side backpack strap to have it easily available whenever I need it. So far I've used it on a very annoying woody vining plant in my backyard (approx. 2in diameter) as well as long fallen branch on a hiking trail that I frequent (approx 3in diameter) and both times it worked just fine for my purposes. The saw teeth can bind every once in a while if you're holding the two ends very narrowly though so I'd say it's best to hold them nice and wide for best results.
Overall, it's not a bad item if you need a compact cutting tool, not the best either but does what it's supposed to.
Total weight of case and saw together is 6 ounces.
I got mine at a slight discount for a little under 25$ US at SawTac.com