SmartFit System - Allows you to select your personal height setting using the color-coded fitting chart so you can work with your mouse for extended periods in optimal comfort Height Adjustable Inserts - Stack the colored inserts up to your comfort color to help set you wrist at ...SmartFit System - Allows you to select your personal height setting using the color-coded fitting chart so you can work with your mouse for extended periods in optimal comfort Height Adjustable Inserts - Stack the colored inserts up to your comfort color to help set you wrist at the correct angle while using your mouse in order to avoid injury and work in better comfort Gel Wrist Pad - The cool, soft cushioning adapts to the natural curves of your wrist for premium comfort and support while you’re scrolling and clicking, taking pressure off your joints which is especially important during extended periods of usage Non-Skid Base - Keeps the wrist rest firmly in place, providing important stability so the mouse pad won’t slide around while you’re trying to be productive