A bottle of sunscreen often gets treated as the whole safety plan for a day outdoors. For anyone whose shift keeps them outside, that claim deserves a check. This article tests it against what independent sources say about work outside.
What the CDC lists among outdoor hazards
The CDC writes, "Physical hazards to outdoor workers may include Extreme heat , which can cause heat stroke or heat exhaustion." Heat appears there as a hazard in its own right. A promise about skin is a different promise from one about heat.
The CDC's guidance on heat stress and workers is the place to read more on that second hazard.
What a sunscreen label can be held to
A label can claim protection. The detail to check is whether it names a standard behind that claim. The Skin Cancer Foundation's sunscreen guidance gives an independent reference to compare it with.
Reading the UV Index before the shift
The U.S. EPA publishes a page on the UV Index. Check it before the day starts. A sunscreen bottle does not tell you that number.
Spots worth showing a clinician
Not every mark on skin means the same thing. DermNet's page on solar lentigo is a clinical reference for one kind of spot. A reference page cannot tell you which of your own spots matters. A clinician who examines your skin can.