Hair straighteners are flat, originating from regular irons. To use them you need to take small horizontal hair sections that can be challenging to find. DAFNI is the original hair straightening brush. The 3D hot surface is 7 times larger than a straightener, which allows for taking large sections of hair, straightening and styling them in simple (slow) brush strokes, and reducing the straightening time from 30 minutes to just 5 minutes (on average).