Coral Safe SPF 50 Face Stick is a biodegradable sunscreen made with non-nano particles and no harsh chemicals. Because it’s biodegradable, it’s ideal for ocean activities like snorkeling and scuba diving — it won’t harm marine life or coral reefs. pocket-size sunscreen stick for face, nose, and ears for when you don’t have sunscreen lotion with you. No mess, no pouring into your hands to use.