All formats are leave-in and depend on the product: for the pump serum, dispense a pump and smooth onto damp or dry hair (do not rinse); use the heat-activated serum before blow-drying or flat-ironing; and use the Frizz Tamer precision wand on dry, styled hair for quick touch-ups.

Reviewers commonly report the serums feel non-sticky and non-greasy, are easy to apply to wet or dry hair, that a little goes a long way, and that they reduce frizz while adding shine without weighing hair down.

Product descriptions target dry, frizzy, and coarse hair, and some formulas are labeled for all hair types or curly textures. Reviewers also report using these serums on fine, color-treated, and grey hair.

Descriptions report a sleek, glossy finish that smooths flyaways and adds shine while remaining lightweight. Notes emphasize no greasiness, flaking, stiffness, or stickiness and that a little product typically goes a long way.