Correct answer
It can deteriorate and become less effective in making you visible.
Prolonged exposure can degrade its materials and reduce its effectiveness in making you visible. Store it away from sunlight in an accessible place and follow the manufacturer’s care instructions. Check its condition and replace it if damaged. Brief exposure does not necessarily make it immediately unusable.
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Sunlight guarantees that all its properties last indefinitely.
It can deteriorate and become less effective in making you visible.
Prolonged exposure always improves its visibility.
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