If you don’t want to take your chances on a box of waterproof matches, then the Magnesium Fire Started from Coghlan’s is the reliable choice.
This fire starter uses magnesium which will provide enough shavings to start hundreds of fires out in the field. The Magnesium Fire Starter from Coghlan’s is a little fiddlier then striking a match, but it’s a pretty failsafe way to start of fire as you’ll never have to stress about broken or wet matches.