The most comfortable, durable and thinnest shorts for air-pressure treadmills on the market. Designed for ease of use and patient satisfaction. Boost Treadmills shorts will work on the Boost 1, Boost 2, as well as all AlterG treadmill models. The shorts should be washed in a gentle cycle on cold or warm and hung to dry. They should not be put in a dryer. Alternatively, the shorts may be hand washed with cold-warm water and a mild detergent, rinsed and hung dry. Sizing guide: X-Small (Men: 26-28, Women: 0-2), Small (Men: 28-30, Women: 4-6), Medium (Men: 30-32, Women: 6-8), Large (Men: 32-34, Women: 8-10), X-Large (Men: 34-38, Women: 12-14), 2X-Large (Men: 38-44, Women: 14-16), 3X-Large (Men: 44-48, Women: 16-18).