The closest match is medium to thick, coarse hair that needs frizz control and humidity protection, which is how KMS describes the ideal user, although the brand lists it for all hair types.

It also suits anyone looking for a silicone-free finishing oil, and people who want one product for hair, beard and body. Fine hair can use it sparingly, but the oil-based texture is designed around heavier hair.

Coarse hair that frizzes usually needs its cuticle smoothed and sealed, and that is the role of this oil. Plant oils and emollients coat and seal the hair fibre to hold in moisture and resist humidity, while the silicone-free formula avoids the buildup some people notice with silicone serums. The result KMS reports is noticeably more shine and far fewer flyaways, from a product small enough to use a few drops at a time.

To prep: apply a small amount to towel-dried hair, using more if needed, then style as usual.

To finish: apply a few drops to dry hair to smooth and seal the cuticle.

KMS notes it can also be used on the body and beard.

The strongest points are measured results and versatility. KMS cites up to 100% more shine and up to 76% fewer frizz and flyaways versus untreated hair, with humidity protection up to 72 hours. It works on damp hair as a styling prep or on dry hair as a finisher, and can be used on body and beard.

The trade-offs: it is an oil, so overapplying can weigh down fine hair. The heat protection KMS lists is for blow-drying, with no temperature rating given, so it is not a substitute for a rated protectant before irons. It contains bergamot oil and fragrance allergens, which matters for sensitive skin, especially when used on the body or beard. Earlier bottles may carry the Tame Frizz De-Frizz Oil name.