In general SFP40 is good enough for most of sun protection needs. A higher SPF value might be needed under special condition. Due to FDA’s new regulation, the highest SPF value on the market is SPF50. Rejuvi has designed a unique dual sun protection concept enabling to achieve SFP80 easily. It is quite simple: apply “x”-cell Vitamin C Complex on the cleansed skin twice, then apply “s” Facial Sun block (SPF40). Vitamin C functions as an internal sunscreen under the skin and could reduce sun damage up to 50%. As a result, the combination of “x”-cell Vitamin C Complex and “s” Facial Sun Block (SPF40) could achieve the overall sun protection up to SPF80 also including all UVA as well !