Workout at home with thisabdominal toning roller with knee matr choose from 3 models to suit you abrl2 b abw2 gr orab2wh gr designed to strengthen abdominal muscles arms and shouldersr twin wheeled for easier balance and non slip handles for comfortr foam padded handles allow for easy gripr includes a knee mat to ensure youre comfortable and not damaging your kneesr lightweight design makes it easy to workout on the gor see full details for specifications of ea