They're kind of like those chocolate covered malt balls, but with a chewier texture and much less sugar. Shot Roks are high protein snacks that don’t melt, freeze or stick together, and there’s no messy powder to mix with liquid. They survived in the bottom of my overstuffed backpack and the high humidity and heat of Taiwan just fine, at least until I gulped them down.
One shortcoming -- There are 10 Roks per bag. When I eat just a couple of Roks (which I've done), the rest of the little balls rattle around in the bottom of my backpack. Again, the balls survived just fine for the day, though I did eventually stuff them into a sealable baggie.