The B.R.U.S.H. 30/40 is a popular heated styling brush, designed as an all‑in‑one alternative to the traditional blow‑dryer + round‑brush and curling iron routine.The B.R.U.S.H. 30/40 is a thermal barrel brush that blends simplicity with professional-grade results. It uses a single optimized heat setting plus oil infusion to deliver smooth, shiny, frizz-free hair in minutes. Available in two barrel sizes, it’s ideal for varied hair lengths and types—all without complicated styling steps.