Trapezoidal beams are made of soft foam measuring 64" in length * Beam can be positioned wide-side down (9-1/2") for greater stability or narrow-side down (4-1/2") for a greater vestibular challenge * Unstable base helps improve ipper and lower body stabilization and coordination * For core conditioning, rehabilitation, gait and dynamic balance * Above photo shown with 2 Airex logs, one on top of the other. Color: Blue