-soft TPR bristles that are durable and flexible for effective cleaning. The bristles are made of ThermoPlastic Rubber (TPR). TPR contains plastic and rubber that is reusable and recyclable. TPR is durable, flexible and will last longer than standard nylon-bristle brushes. -A soft grip handle complete with hang-up hole for quick drying and easy storage. -Patent Id: 201830537647.7