The 38" Rebounder with resistance tubes, and electronic monitor is a fun way to build cardiovascular fitness, tone your legs, abs, buttocks, and back, have more energy, rev up your metabolism, and just feel, look, and be fit. The larger rebounding surface adds stability and more exercise options. The resistance tubes let you focus on building strength in your arms, shoulders, back and chest. The blue outline adds safety by keeping you bouncing inside the mat's 'sweet spont' area. The 38" Rebounder takes up a small amount of space and is easy to store out of the way when not in use.