Inversion boots allow you to recover quickly from compression fatigue caused by jogging, aerobic training, stepping, bicycling and weight training. . Hanging in the inverted position brings instant relief to many forms of back pain and spasms associated with consistent downward gravitational pull on the spine, discs and muscles. Just a few minutes a day are sufficient to spread apart painful compressed discs. Back, neck and shoulder muscles are also stretched, further increasing flexibility and reducing pain. Sold in Pairs Thick, comfortable, contoured support pads Heavy-duty single-action locking mechanism Built-in safety lever Extra pads for all size users Requires a horizontal bar - use power racks and pull up bars Assembled Weight: 5.5 lb /2.5 kg Assembled Dimensions: Length Width Height 7.0 in /177.8 mm 8.5 in /215.9 mm 7.0 in/177.8 mm Package Dimensions: Length Width Height 13.0 in /330 mm 7.9 in /200 mm 7.1 in /180 mm Volume Gross Weight 0.42 ft3 /0.012 m3 6.2 lb