Calypso Once a Day Sun Protection SPF20 200ml is a sunscreen product designed to provide long-lasting protection against the sun's harmful UV rays. With a sun protection factor (SPF) of 20, it offers moderate protection for your skin. The "Once a Day" formula suggests that you only need to apply it once daily, making it convenient for extended outdoor activities. The 200ml size indicates the volume of the product contained in the bottle. This sunscreen is likely suitable for daily use and may provide water resistance, but specific details may vary depending on the manufacturer's instructions and formulation.