Dyson Omega Hydrating hair oil is a concentrated, yet lightweight hair oil that nourishes, smooths frizz, and provides a shine-boosting seal with heat protection up to 450°F. Using Dyson Omega hydrating hair oil vs. non-conditioning shampoo on straight hair. Tested on tresses in a laboratory setting.²When used with Dyson Airstrait straightener vs. untreated hair. vs. untreated hair..