Optimizes comfort and the health benefits of ergonomic seating. Slip-resistant surface with 30 rollers for optional sole massage and improved circulation. Three adjustable angles for customized foot positioning. Five adjustable heights for leg elevation to relieve lower back pressure. Patented rotary tie mechanism for easy height adjustments. Internal locking system and built-in handle for compact folding and convenient portability. Perfect for office use, home relaxation, or improving posture during long hours of sitting.