SPF30 and SPF50 offer similar protection, blocking about 97% and 98–99% of UVB rays respectively. The real difference lies in correct use: applying enough and reapplying regularly is more important than the SPF number. For athletes, sweat and water reduce effectiveness, so stable, broad-spectrum formulas - especially with mineral filters like zinc oxide - provide more reliable protection during outdoor activity.

During sports, sunscreen can cause a burning sensation in the eyes because sweat breaks down and moves the product across the skin, allowing small amounts to migrate into the eyes (“eye sting”). The eyes are highly sensitive, so even minimal contact can lead to irritation, blurred vision and discomfort.