 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  you have questions about selecting a product. Sun Protection Factor (SPF) is a rating that tells how much protection a product provides against sunburn. The higher the number, the greater the protection. An SPF of at least 15 is recommended. Products with SPF 30 provide high protection against sunburn. The FDA states that products with SPF above 30 provide a benefit that is not much greater than SPF 30 products. Water-resistant products provide protection for up to 40 minutes of water activity or sweating. Very water-resistant products protect for up to 80 minutes. Reapply sunscreen as often as necessary. Remember that water, sand, and snow reflect the sun. You should protect yourself with sunscreen when in these surroundings. Apply sunscreen even on cloudy days because the sun's radiation is still present. In addition to sunscreen, wear protective clothing (such as hat, long sleeves/pants, sunglasses) when outdoors, and stay in the shade when possible. Avoid prolonged sun exposure, especially between 10 AM to 4 PM when the sun's radiation is strongest.  Missed Dose Apply sunscreens generously and often when outdoors.  Storage Store at room temperature away from heat and light. Refer to the storage information printed on the package. Do not use a product after the </s>