Use SunFriend to prevent sunburns Sun Safety is paramount! SunFriend is scientifically engineered to maximize your safer time in the sun. SunFriend is customizable - choose a sensitivity level that fits your skin type. SunFriend flashes when you have had enough sun, letting you know when it is time to cover up, go inside or wear a premium sun block. It will not overheat. SunFriend is waterproof and durable. Use SunFriend daily as part of a regular health program. Use SunFriend to get enough sun every day. The best-known benefit of sunlight is its ability to boost the body?s vitamin D supply. Most cases of vitamin D deficiency are due to lack of outdoor sun exposure. Sunshine provides long-lasting vitamin D, plus the sun will help lower your blood pressure, enhance your mood and bring your overall wellness into balance.