This buttock enhancer is a one piece panty with foam padding built right into the buttocks. It is molded and formed to keep its shape. Just slip it on and you are ready to go. No need for additional inserts etc. Pre shaped, natural looking padded panty is contoured & formed to resemble a realistic round bottom. Features 1 inch thick foam pads. 92% nylon, 8% elasthanne. Hand washing is recommended for longest wear.