The Teeter Adapter Kit Whether you&0re searching for natural back pain relief, a way to take proactive care of your joints, or a convenient & fun way to strengthen & stretch, the Adapter Kit will allow you to maximize the use of your Teeter Hang Ups Inversion Table. The Adapter Kit comes complete with Gravity Boots & a CV Bar, which converts the standard ankle clamps of select Teeter Hang Ups ® inversion tables, to enable use with the Gravity Boots. Aside from standard inverted decompression & stretching, Gravity Boots provide an ideal way to perform inverted exercises including core strengthening & leg workouts. Teeter Hang Ups is the only brand to offer optional accessories for the inversion tables, giving customers freedom of choice & convenient options for increased comfort & ease of use. Gravity Boots:- Dual, Self-Locking Buckles: Much like a ski boot, Teeter Hang Ups Gravity Boots ratchet securely around the ankle & lower calf area for a customizable, comfortable fit. Super-soft 5/8" foam liners are a special blend to give maximum comfort with minimum compression. Optional Calf Loops. Loop wraps behind each calf to place a 2 degree bend in the knees which helps to reduce the load on the knee joints & top of the foot. Loops are removable. Flexible, Lightweight Shell made from light but highly durable Du Pont Hytrel material for a more forgiving, slightly pliable fit. Each boot weighs just 2 lbs. The hooks & calf loops are constructed of a 40% glass-nylon alloy for unmatched strength & durability.