Multiple outlets report that people who use foundation or moisturiser labeled with SPF may assume their skin is fully protected, but that coverage is often incomplete. The articles highlight that SPF products do not necessarily shield every area of the face unless they are applied carefully and evenly. They point to the idea that gaps can occur around commonly missed spots, meaning some skin may remain exposed to ultraviolet radiation even when a person applies SPF to the rest of the face. The coverage emphasizes proper application as the key factor in effectiveness, including ensuring product reaches all exposed skin areas and is used as directed. The reports also imply that SPF in foundation may be uneven due to how makeup is applied or re-applied throughout the day. Overall, the sources present a caution that SPF foundation or moisturiser provides protection only where it is actually applied, and that users should check they cover all relevant facial areas in addition to relying on SPF labeling.