"You might know that icy cool feeling of drinking a cold glass of water after chewing a piece of spearmint gum. If you don't and that's just me, take my word for it — it's slightly addicting. That's how I feel about the Frank Body Caffeinated Hair Mask ($17). Not only did it soften my hair and define my natural waves, it gave me a sensory experience that I look forward to each time I head to the shower. It's like a cool blast to my scalp that clears it of any dirt of debris, soothes any itchiness, and just feels so damn good." — JC