Designed for hygienic rinsing, a sliding nozzle and guide on Avantgarde are made of Crastin PBT thermoplastic polyester resin. For safety, Closomat selected a flame-retardant grade of this resin because Avantgarde’s rinsing nozzle is situated near a hot air exit and the toilet’s electronic control box. Crastin PBT was also selected because of its long-term resistance to immersion in water.

"As an important hygienic feature, the douche nozzle is automatically cleaned when it retracts after use.