Features: Soft underarm airbag: This floldable crutches come witha soft inflatable airbag under the arm. You can adjust the amount of gas in the airbag freely to achieve the most comfortable state, which solves the pain points in your armpits when using crutches Easy to read height: Clear scale and simple push button mechanism adjusts crutch height in 1 inch increments Specifications: Material: aluminum, TRA rubber Color: grey Size: about 38.6 to 62.2 inches Package includes: 1 pair underarm crutches Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays.