1.Ergonomic Handle: The armrests are made of TPE material and molded in one piece. They are waterproof, nonslip, comfortable to hold and maintain a constant temperature. The handles provide a comfortable and secure grip position, which can support up to 330.7 pounds, while the firm grip greater leverage and support. 2.Applicable Size: Suitable for chairs/sofas with a ground clearance greater than 1.38 inches and a sofa height less than 22 inches. The distance between the two armrests is 20.9 inches, suitable for people of different body sizes. 3.Easy to Clean and Rubber Feet: The handle of the aid is waterproof. Just clean the exterior with a damp cloth. The rubber foot pads can effectively prevent floors and carpets from being scratched. 4. Chair Aid: The aid can be assembled by yourself in a few simple steps. You can easily change its position from one location to another. It brings more convenience and ease for the elderly to sit and stand.