Double hooks for two MED-EL RONDO speach processors (cochlear implant system) that prevents loss and damage . They are made of thin (0,6mm) silicon rubber and durable clip. Light and little clip make a strong connection to cloth. The lenght of the rubber from the clip to the processor unit is around 21-22 cm. Hooks are not conspicuous and they are recommended to be used by older childern, juniors and adults.