Teeter Gravity Boots are portable and ultra-light, allowing you to fully invert at home or the gym. Decompress your spine, boost recovery, and enhance your workouts with inverted core and leg exercises. The boots feature plush foam liners for maximum comfort with minimal compression, and dual ratchet buckles for a secure, customized fit. Optional calf loops are included to help create a small bend in the knee, reducing impact to your knees and feet. These boots are one-size-fits-most, accommodating most leg/ankle sizes with a standard boot diameter of approximately 5 inches and circumference of 15 inches. Specifications include dimensions of H:38.1 x W:5.0 x D:12.7 cm, a black color, and a 5-year guarantee. Material: Plastic. Model Number: B1001.