- An innovative styler that is applied in the shower and lightly rinsed, leaving behind only what you need to create beautiful air-dried styles. It features our Thickening Molecule (PBAE) and lightweight conditioners which deliver: enhanced natural texture, body, softness, and shine. Perfect hair Day (PhD) In-Shower Styler is ideal for straight to slightly wavy hair. It is silicone-free and sulfate-free. Safe and formulated for color and chemically treated hair. Shampoo and condition hair as ususal. Then apply this product generously to coat hair from roots to ends while still in the shower. Lightly rinse. Towel Dry. Scrunch. Air Dry. Not sure how much to rinse? Make sure you can still feel some product on your hair. If you have naturally straight hair, try putting your hair in braids or buns and letting it air dry for best results. Tip: If you have naturally straight hair, try putting your hair in braids or buns and letting it air dry for best results.