Boost microgravity treadmills allow you to run or walk at anywhere from 100% to as low as 20% of your bodyweight, in 1% increments. This reduction in effective body weight is achieved by creating a higher pressure around the your lower body. The Boost 2 is the only microgravity treadmill available that utilizes a motorized height adjustment system. You only need to enter your height and the Boost 2 does the rest. The treadmills are built on the patented Woodway 4Front slat-belt running surface, integrating shock-absorbing technology for unmatched durability. The treadmills are adjustable for users ranging from 4’6” to 7’ tall. They are lightweight shorts ranging from size 2XS to 5XL