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Great reviews and lowest its been on Amazon

Link [amazon.com]

– Double-bar system makes mounting and dismounting easy
– Door-savers protect the doorframe from damage while in use
– Dual, self-locking ratchet buckles on Gravity Boots add security.
– Gravity Boots feature Calf Loops, which place a 2-degree bend in the knees to help reduce load on knee joints and top of the foot
– 5-Year Warranty; Includes Instructional DVD. This Pair of Gravity Boots comes in standard size