Magnesium Fire Starter with Striker Blade
$11.65
This is the most basic and fundamentally needed item in a bugout bag or your survival kit. Making fire in the rain is a bitch. Magnesium shaving are not affected by this problem. As long as you can gather enough tender and a small amount of dry materials to burn, initially water won't affect the burning of the magnesium except to help it. Just remember that two is one and one is none, so stock up.
Integral flint strike bar
Reliably starts hundreds of fires
Striker included