What is the benefit of a tension-adjustable seat sling?

What is the benefit of a tension-adjustable seat sling?

Over time, a traditional upholstery seat sling can begin to sag and lose its shape. The tension-adjustable straps on the seat sling can be adjusted easily and in a single movement so that the seat sling remains taut for improved pelvic support and positioning. You can even use the seat-sling for positioning, such as placing the pelvis lower than the thighs for additional postural stability.