RUSHBRUSH Straightening Brush S3 RUSHBRUSH Straightening Brush S3 is introducing a new revolutionary Hair Straightening Brush. Boosted by ionic technology, it helps seal your hair cuticles and eliminate frizz, as well as add shine and repair your hair quality, making it smooth with a silky and lustrous look. Also, it features an anti-scald technology to protect even the most sensitive scalps, as well as its comb-like bristles that create an effortless glide through your hair. Not only this, but with the power of tourmaline-infused ceramic plating, you’ll get silky, smooth, straight hair only with a single pass.