This is another product that we keep in all of our personal kits. The FireSteel Scout is unaffected by water and produces a shower of hot sparks.When used with dry tinder, WetFire cubes, fatwood or cotton balls it makes fire starting easy.
From the manufacturers website:
Originally developed for the Swedish Department of Defense, our legendary Swedish FireSteel® is the original magnesium fire starter. Our second generation Swedish FireSteel 2.0® comes with an improved striker that makes it even easier to build a fire in any weather and at any altitude. It has a new design, a color matched flexible cord and a built-in emergency whistle.