Vertical Movement For vertical movement, the design of S series provides palm support more towards the front as the hump is closer to the middle. The shorter overall design provides more space that allows users to do vertical movement freely For Different Grips The front side of the mouse is widened to provide extra support for lifting the mouse and ensuring a secure grip. The concave curve design provides more support for the fingers, which allows claw grip users to lift the mouse easily. Concave curved sides designed to lift the mouse easily. Front end of the mouse is raised to provide more space to place 4th finger and little finger, easier to adjust and find a suitable position. With the S series’ smooth and seamless design, you won’t experience any discomfort related to jagged edges or protrusions made solely for aesthetics.