SolRx Sport/Athletic 8 Hour Waterproof Dry Zinc sunscreen- Sal-Free, Paraben-Free, Paba-Free, Oil-Free, Unfragranced. Goes on both dry and clear: No greasy / tacky feel and no white sheen. Once a day application, even for athletes. Rates SPF#40 in the 8 Hour Waterproof Test, which uses 12-30 minute immersions with 10 minute intermissions. SolRx testing is conducted AFTER this test and the product still rates 40.