About the product    ? ADJUSTABLE: The slant board adjusts to 3 levels of heights: 18"， 22.5"， 36.5".                                                                ? DURABLE: High-quality non-toxic adjustable calf stretcher board.                                                                ? COMFORTABLE: Non-slip front and back surface creates a stable surface for foot and back.                                                                ? Dual-Purpose: Can be used at home， at work. Just flip the board and enjoy your stretch and massage for foot and back.                                                                ? Easy Assembly: Ready to use right out of the box.