Independent Quality-Assurance Tested to Highest Safety Standard: Voluntary compliance to ULs inversion table safety standard makes Teeter Hang Ups the only inversion brand with certified quality. Notable features with the EP-560 Sport: EZ-Up Gravity Boots: Use your Gravity Boots with the table or take them to the gym; great for inverted sit-ups and squats. The Gravity Boots wrap comfortably around each ankle, securing with adjustable, self-locking ratchet buckles. Super-soft 5/8 foam liners are a special blend to give maximum comfort with minimum compression. Made of light, highly durable DuPont™ Hytrel™ material for a comfortable fit. EZ-Stretch Traction Handles: Provide added benefit for inverted stretching and decompression, as well as an effective tool for oscillation.