When folded, all 4 legs of the walker come in contact with the ground to provide additional support when passing through narrow areas. Latex free handgrips and leg tips are made of thermo plastic. The release mechanism "pops up" with an audible "click" that ensures the side frame is completely opened. The push palm release makes it easy to open and close from a seated or standing position. The walker is manufactures utilizing a unique process that eliminates the use of fasteners to prevent any component from becoming loose over time. Limited lifetime warranty.