The blades and comb are rounded, which, coupled with the
material they're made of, goes a long way to
preventing, or at the very least lessening
skin irritation.
However, although the ultrathin films and rubber sheets used in these devices adhere and conform well to the
skin, their lack of breathability is deemed unsafe for long - term use: dermatological tests show the fine, stretchable
materials prevent sweating and block airflow around the
skin, causing
irritation and inflammation, which ultimately could lead to lasting physiological and psychological effects.