iREBOUND "THE FITNESS COMPANION" HALF Fold 45" Extra Large Soft Jump Rebounder with adjustable Stabilizing Bar. NASA STANDARD TRAINING FOR ASTRONAUTS. Featuring 24% more room for more comfort and safety. The sturdy frame is 0.99" x 0.99" x 0.05" square section tubing supported by 8 super strong legs. Most rebounders in the market have only 6 legs and are only 40" in diameter.