Carex Foam Cushion. The Carex Foam Perineal Cushion is designed for the new mother or those with perineal discomfort. The high density "donut" foam cushion conforms to natural body contours for maximum comfort. This foam cushion is perfect for use at home, in the office, or while traveling. The removable cover is machine washable and wrinkle resistant, allowing easy maintenance. The Carex foam perineal cushion provides perineal pain relief without the complications of drug therapy or topical applications. The central pressure-relieving channel allows for a breathable passage of airflow.