Shower before hitting the pool.
It may seem counterintuitive to shower before swimming (rather than after, of course, when you’re covered in chlorine), but the wellbeing of your hair may depend on it. Why? “Hair is porous,” explains Nicole Hitchcock, owner of NH2 Salon, a luxury hair salon in the San Francisco Bay Area. “Once it’s saturated with moisture, very little chlorine will [be able to] enter the shaft.” Imagine the cuticles of your hair acting somewhat like a sponge. If they’re filled with clean water, it’ll be harder for the pool water to work its way in and inflict damage. If showering beforehand isn’t an option, keep a travel-sized conditioner in your pool bag to saturate your hair with before entering the pool.
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