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The Sunspi blog

Read the research.

Skin cancer, sunscreen and the ocean, explained plainly. Every number is sourced.

Sunspi covers every inch from the neck down with reef-safe sunscreen. Face and scalp sunscreen is your own step.

  1. Skin cancer

    Melanoma by the numbers: who's at risk and why early prevention matters.

    The 2026 figures, what drives risk, and why where it's caught changes the outcome.

  2. Application

    Why most people apply sunscreen wrong: amount, missed spots and reapplication.

    Too little, too rarely, and the back, shoulders, backs of the legs and feet left bare.

  3. Reefs

    How sunscreen chemicals harm coral reefs, and what “reef safe” really means.

    What the science says about oxybenzone and octinoxate, and what the label does and doesn't promise.

  4. Policy

    Hawaii's sunscreen rules, and how big a change they have made.

    What the state and county laws actually ban, and what the evidence shows so far.

Demo coming soon

Be first in line.

Sunspi covers every inch from the neck down, in seconds, for a few dollars, with reef-safe sunscreen only. Join the waitlist and hear when the demo is ready.

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