Kettler puts safety first – always. One of the primary ways of ensuring that your child stays safe while riding one of Kettler’s line of tricycles is to use the Kettler Kettrike Safety Seat Belt. Made to ensure your child’s safety while he or she is riding, the Kettrike Safety Seat Belt securely fastens between your child’s legs as well as around his or her waist. Appropriate for age 18 months to five years, and can be added to any Kettrike tricycle.