Nick N.wrote a review of Ultimate Survival Technologies Wetfire Tinder on January 12, 2017
Familiarity: I've put it through the wringer
This stuff is cool. You can crumble it on top of water and light it. Will light every time. I have found if you keep one it warm while winter camping they light faster with a smaller spark. I keep a few in all my packs and first aid kits.