There are a couple ways to protect your hair from the salt in the sea: - Wear a swimming cap- this is probably the most effective as the cap will stop the majority of your hair and scalp getting wet in the first place! - Pre-poo your hair with an oil before going in the sea. Be sure to use an oil that suits your hair profile though! - Drench your hair in pure water before going in the sea. If your hair is already wet before going in the sea, it won't be as vulnerable to the damage the sea salt can impose. These tips can also be applied when swimming in swimming pools too, to protect your hair from chlorine!