What SPF means
SPF is primarily related to UVB protection under a standardized laboratory test. A higher number does not mean that the product can be applied in a very thin layer or never reapplied.
In practical terms, selection should be based on the exact task and label rather than one fashionable word on the front of the package. Compare several options, consider the conditions of use and begin with a moderate amount of product.
What PA means
PA is an UVA protection rating widely used in Asia. The number of plus signs indicates a category, but does not replace the manufacturer’s full information.
In practical terms, selection should be based on the exact task and label rather than one fashionable word on the front of the package. Compare several options, consider the conditions of use and begin with a moderate amount of product.
Fluid, cream or essence
The main differences are usually feel, spreadability and finish. A light fluid may be more comfortable in heat, but the best choice depends on skin and the other layers in a routine.
In practical terms, selection should be based on the exact task and label rather than one fashionable word on the front of the package. Compare several options, consider the conditions of use and begin with a moderate amount of product.
Body sunscreen
Body products often come in larger sizes and are designed for exposed areas. Do not automatically apply a body formula around the eyes unless the manufacturer permits it.
In practical terms, selection should be based on the exact task and label rather than one fashionable word on the front of the package. Compare several options, consider the conditions of use and begin with a moderate amount of product.
Powders and sprays
These formats can be convenient for reapplication, but adequate quantity is difficult to judge. They are better considered supplementary rather than the only protective layer.
In practical terms, selection should be based on the exact task and label rather than one fashionable word on the front of the package. Compare several options, consider the conditions of use and begin with a moderate amount of product.
Water resistance
Water resistant does not mean waterproof. Reapply according to directions after swimming, sweating or towel drying.
In practical terms, selection should be based on the exact task and label rather than one fashionable word on the front of the package. Compare several options, consider the conditions of use and begin with a moderate amount of product.
Expiry and storage
High heat may affect formula stability. Sunscreen should not be left in a hot car or direct sun.
In practical terms, selection should be based on the exact task and label rather than one fashionable word on the front of the package. Compare several options, consider the conditions of use and begin with a moderate amount of product.
A practical choice
A comfortable product used regularly and in sufficient quantity may be more useful than a theoretically maximum rating with an unpleasant texture.
In practical terms, selection should be based on the exact task and label rather than one fashionable word on the front of the package. Compare several options, consider the conditions of use and begin with a moderate amount of product.
Practical checklist
- Apply an adequate amount to all exposed areas.
- Allow the product to spread evenly before exposure.
- Reapply after swimming, sweating and towel drying.
- Remember ears, neck and backs of hands.
- Combine sunscreen with clothing and shade.
- Keep the product away from excessive heat.
