Based on our iconic CS 5460 brush. With an extra small brush head… but more CUREN filaments. 7,600 of them – tightly packed together to give gentle, exceptional, cleaning power. In a class of its own: with its small brush head, the CS smart is actually a children’s toothbrush. Nevertheless, our adult testers were equally enthusiastic: they said it is exceptionally accurate when brushing and wonderfully fine. We should have realised this when we gave it so many fine Curen filaments. For children over the age of 5 and for adults. 7’600 CUREN filaments, 0.08 mm.