BetteAnti-Slip Sense is our latest evolution in slip resistance. Hidden in micro particles, the friction effect is only activated on contact with water. When dry, you will not notice any difference in the look or feel of the bath or shower. So BetteAnti-Slip Sense blends harmoniously with the rest of the bathroom. Rated with the highest rating group C to DIN 51097 (tested by TÜV Rheinland LGA Bautechnik GmbH, according to test certificate BTV 21V30174-01).