Stable & Strong Z21 Walkers for seniors weigh only 19.4lb, designed for easy carrying by seniors. The aluminum alloy tubes have been thickened to become stronger and more durable. Compared to steel, recommended users weight 330lb. Z21 rolling walker with seat also features an innovative 3-second quick folding design, the folded size is only 31.5 x 25.9 x 13.8 inches, making it easy for storage in the car trunk. Ultimate Comfort Exclusively designed bionic seat is designed ergonomically according to the human body structure, perfectly relieving pressure on the hips. With 1.6" thickened waterproof feature, it provides an unparalleled comfortable sitting.