The Sunscreen Guide was developed by Sails of Change, an international sailing team based in Brittany, France and a member of Sports for Nature. It was created to help athletes and outdoor enthusiasts choose sunscreens that protect both human health and the environment, after the team discovered how difficult it was to identify genuinely sustainable products amid complex ingredient lists, unclear labelling, and misleading environmental claims.
Sunscreen is essential for preventing skin damage and reducing the risk of skin cancer, but its ingredients can also enter waterways through swimming, showering, and wastewater systems. An estimated 4,000 to 14,000 tonnes of sunscreen reach aquatic environments each year, where certain chemicals may persist in nature, accumulate in wildlife, and contribute to ecosystem degradation.
The Guide distinguishes between chemical (organic) and mineral (inorganic) UV filters. Both are equally effective at blocking UV rays, but mineral filters such as zinc oxide and titanium dioxide are generally considered the less controversial option, since they act at the skin’s surface rather than being absorbed into it, and carry fewer associated environmental and health concerns. The Guide therefore recommends certified mineral based sunscreens wherever possible.
To support informed choices, the Guide identifies ingredients to avoid, including chemical UV filters such as oxybenzone, octinoxate, and octocrylene, along with microplastics, silicones, PFAS, parabens, phthalates, and unnecessary fragrances. It also advises caution around nanoparticle formulations and notes that marketing terms such as “reef safe” or “ocean friendly” are not regulated certifications, the ingredient list should always be checked directly.
The core recommendation is straightforward: choose a certified organic, water-resistant mineral sunscreen with SPF 30 or higher, in cream or stick form rather than spray.
For full detail, including specific sunscreen recommendations for both skin and environment, please see the Guide below.
Disclaimer: This guide was developed to help the Sails of Change Sailing Team identify sunscreens that may be safer for both personal use and the marine environment. It does not constitute a commercial endorsement of any product, manufacturer, or brand, and the team is not sponsored by the brands mentioned. The information is for general educational purposes only and is not medical, dermatological, or professional advice, individuals should consult a qualified healthcare professional before making decisions based on their own health circumstances.
