Best reef-safe sunscreen for snorkeling

If the water is Maui or the Big Island, chemical SPF is the wrong bottle even when it says Hawaii compliant. The useful test is mineral UV filters, then Palau if you are flying farther. A shirt still beats every SKU below.

1. 01 · Strict pass

   Thrive Natural Care

   PASS

   Zinc 23.5%, non-nano, no phenoxyethanol. Palau is fine, same as Maui.

2. 02 · Dive-shop mineral

   Stream2Sea

   PASS

   Non-nano zinc 19%. The brand markets eye comfort and wet performance. That is a claim, not a swim we did.

3. 03 · Drugstore mineral

   Blue Lizard

   MIXED

   Buy Sensitive Mineral or Sport Mineral, not a chemical leftover. Zinc 10% plus titanium 8%. Passes Maui and Palau. Nano still undisclosed. Sun Bum Mineral is easier to find in some stores and fails Palau on phenoxyethanol.

4. 04 · Not a bottle

   Rash guard

   Cover the torso. Use lotion on face, ears, hands, and the back of the neck. That is the actual reef-safe stack. We are not going to rank ten creams to hide it.

What we used as the test

Destination legality first (Maui mineral-only). Then Palau preservatives. Then whether a traveler can actually buy the SKU. Eye sting and wash-off matter in the water. We do not have our own in-water numbers yet, so those stay as brand claims on the Stream2Sea page. Neutrogena Sheer Zinc would have been a drugstore mineral pick. Neutrogena marked the adult lotion discontinued on the page we read, so it is not a pick. Blue Lizard Sensitive took that slot. Thinksport SPF 50+ and Raw Elements Travel SPF 30 are other labeled non-nano zinc lotions.

Full method: how we label. Island rules: Hawaii.