This is a heat-styling brush for anyone who blow-dries their hair into shape rather than air-drying — it's meant to be paired with a hair dryer, not used as a plain brushing or detangling brush. The ceramic barrel and ionic nylon bristles are aimed at reducing static and smoothing the cuticle as the dryer's heat passes through the vented barrel.
Dannyco sells this ceramic/nylon design across five barrel sizes, from about 3.5cm up to 6.5cm; smaller barrels are generally chosen for root lift, bangs, and shorter layers, while larger barrels suit smoothing or adding a soft bend to longer hair. Because the exact barrel size of this particular listing isn't specified, buyers working on longer hair or looking specifically for a root-lift brush may want to confirm the size before purchasing.