Ergonomically designed and built to engage multiple muscle groups, the Sunny Health and Fitness Core Glider Ab Waist Trainer Machine help you focus and shape your core and body. Featuring a sturdy design and construction that can carry a max user weight of 220 Lb, it is durable enough for any core workout. Connect with the Sunny Health and Fitness community with the free SunnyFit App to get tips, advice, and view training videos from our Sunny fitness trainers.