This lightweight styling oil is the foundation of your daily styling routine. It smooths frizz, adds lustrous natural shine, and protects against heat styling and humidity. This lightweight styling oil is the foundation of your daily styling routine. It smooths frizz, adds lustrous natural shine, and protects against heat styling and humidity. Founded by celebrity hair stylist Mara Roszak, RŌZ (pronounced “rose”) is a meticulously crafted and curated collection of hair care inspired by nature and rooted in performance.