Are the tension-adjustable straps comfortable?

Are the tension-adjustable straps comfortable?

The Nitrum was designed and developed with input from wheelchair users, who also tested the product and provided feedback. The outcome was the development of a system which needs less force to tightly tense the upholstery; this system is referred to as a “block-and-tackle” routing of the straps. The upholstery is easy to adjust, does not shift, and remains comfortable! There are two versions available – the standard seat upholstery with tension adjustable, breathable fabric and the strap-style design for improved breathability and less weight. Like with any rigid wheelchair, a cushion is used on top of the seat sling for optimum seating and positioning.