Dyson Define & Refresh Styling Duo in Beauty: NA. Dyson Define & Refresh Styling Duo in Beauty: NA. A luxury value set that nourishes, protects and provides style retention for all hair types. Includes Dyson Omegaâ¢ Leave-in conditioning spray to strengthen hair for maximum shine and Dyson Chitosanâ¢ Multi-use styling spray to hold and define end style or revive second day hair for re-styling. Dyson Omegaâ¢ Leave-in conditioning spray (50ml) and Dyson Chitosanâ¢ Multi-use styling spray (50ml).. Vegan and cruelty-free Free of silicones. Omegaâ¢ Leave-in conditioning spray: Oli7â¢ is Dyson's unique blend of seven omega-rich oils including sunflower seed oil sourced from Dyson Farms. Dyson Chitosanâ¢ Multi-use styling spray combines chitosan derived from oyster mushrooms with a blend of amino acids and bamboo extract to lock in styles and maintain smoothness. Spray Omegaâ¢ Leave-in conditioning spray on clean, damp hair for nourishment and detangling.. Style as desired. This Leave-in conditioner provides heat protection up to 450Â°F.. Spray Chitosanâ¢ Multi-use styling spray on dry, styled hair for flexible all-day hold.. DYSR-WU27. 168917-01.