Looking for SPF 50 sunscreen? Higher SPF numbers sound like a huge leap, but the practical difference gets smaller as SPF rises. SPF 45 already blocks a very high percentage of UVB rays when applied correctly, and application matters more than most people want to admit. Stream2Sea focuses on mineral sunscreen made with non-nano zinc oxide and without oxybenzone or octinoxate. If you came here chasing a bigger number, start by choosing a formula you will apply generously and reapply as directed.