Washing out the sea salt and chlorine from swimming in pools and the ocean is important as both work as drying agents on your hair which can make your hair brittle and lifeless. Washing with a mild shampoo daily if necessary is recommended to protect your scalp and hair follicles from the salt and chlorine. Preventative measures are to use a leave-in conditioner or to soak the hair with tap water prior to swimming to prevent the chlorine or salt from penetrating into the cortex of the hair shaft and damaging the cuticle. Once the cuticle has been compromised, hair strands begin to break and split. Try Kerastase Soleil Gelee Aqua Proof, a long lasting water resistant sun protective gel.