You will want to avoid the sun and a chlorine pool until you are fully healed from your Halo treatment. Once you are healed, make sure to apply waterproof broad spectrum sunscreen at least 15 minutes before sun-exposure and swimming. Chlorine protects you from the harmful bacteria that can grow in swimming pools, but soaking in it for too long may dry out your skin. The acid formed when chlorine contacts water is a natural irritant to the skin. It also can strip the natural oils from the skin, causing dry, itchy, and irritated skin. Rinse skin immediately with fresh water and clean the skin with a gentle cleanser. Finish with a hydrating moisturizer. We recommend Alastin Ultra Nourishing Moisturizer with TriHex Technology. Always talk with your Laser Technician in depth before you are treated with Halo