To be blunt, Iceland is not Disneyland. Things don't always go as planned. A hike can turn disastrous, even for experienced travelers.
Getting stuck on the highlands is no joke. We at Rent a Tent always recommend planning ahead. Plan your route beforehand, let people know where you are going and when you intend to return and most importantly; have the right gear for your trip.
These emergency flairs are only to be used in the most dire circumstances, having one could save your life.
The flair burns a bright red for a full minute or 60sec. DO NOT USE UNLESS THERE IS AN ACTUAL EMERGENCY.