Built for fine to medium hair that frizzes or develops static but goes limp under oils and creams. KMS specifically positions it as a weightless option.

It is useful for anyone wanting a final touch-up spray for humid days, and for people who prefer silicone-free finishing products.

Fine hair has a frizz problem that most anti-frizz products make worse: they weigh it down. This serum sidesteps that by being a light, water-based spray applied to dry hair at the end, taming flyaways and static while leaving movement intact. With humidity protection KMS rates at up to 72 hours, it is a quick finishing step that keeps a style looking smooth through the day.

1. Start with dry, styled hair.
2. Loosen the hair with your hands.
3. Spray onto dry hair to finish the look.

Its spray format and water base are the key advantages for fine hair: it smooths flyaways and static without the weight of an oil, and KMS reports frizz control and humidity protection lasting up to 72 hours.

It is less suited to thick, coarse hair, where a richer product like an oil will do more. It contains denatured alcohol and fragrance, and KMS does not list heat protection for it, so it is a finisher, not a pre-styling protectant.