The first thing you will pay attention to is probably SPF. The darker your skin, the lower the SPF index you need! However, please look for a line read “broad spectrum”, which indicates the protection over UVA (aging) and UVB (burning) rays. These indexes are usually indicated by stars, 1 means minimum and 5 means maximum protection. Most people should go for SPF 30 rather than SPF 50. The SPF 50 filters 98% of the UVB rays compared to 97% with the SPF 30, but the thickness creates a delusion of security. In fact, many users have forgotten to reapply every 2 hours as they should.