The AbMat is a one of a kind abdominal exerciser and core trainer. A safe, comfortable design that is contoured to your lower back to provide support and to help prevent injury when performing sit-ups or other core strengthening exercises. Lightweight and portable! Three lbs., 15" L x 12" W x 2 1/2" H. Features: DVD included. 15" L x 12" W x 2 1/2" H. 3 lbs. Color: Black. One size fits all. Designed to contour against your lower back to provide support when performing core exercises.