Once you start to sweat, a dry shampoo like the Living Proof Perfect hair Day (PhD) Dry Shampoo ($24) will become your best friend. For those with darker hair and skin, Toth recommends the Verb Dry Shampoo for Dark Hair ($16). "That way, the colour will blend with your hair and if you sweat a little bit, the colour will blend with your skin tone too," Toth said.