Dr. Barbara Sturm consistently points out that “SPF” is itself a misleading term, referring only to protection against UVB, but indicating nothing about protection against equally dangerous and damaging UVA rays.
At Dr. Barbara Sturm we believe broad spectrum sun protection (against both UVA and UVB) is absolutely essential at all times that an individual will have meaningful exposure to UVA or UVB rays, the former of which can also penetrate car, office and aeroplane windows.