Concave keywells are scooped into a bowl shape to reduce hand and finger extension and relax muscles Separating the keywells positions the arms at shoulder-width to keep wrists straight and perpendicular to the home row to reduce abduction and ulnar deviation The keys are arranged in vertical columns (rather than staggered) to better reflect the natural motion of your fingers The two keywells are “tented” to moderately raising the thumb side of the hand. Tenting puts you in a more neutral, “handshake” posture and reduces the stresses caused by forearm pronation. Choose from one of three heights depending on your preferences. The integrated palm supports reduce stressful bending of the wrists and provide a convenient place to rest your hands when you are not actively typing The thumb clusters include frequently-used keys such as Enter, Space, Backspace, and Delete to redistribute the workload away from your relatively weaker and overused little fingers to stronger thumbs. The Advantage360 may look big, but it actually has a smaller footprint than most keyboards because we eliminated the numeric 10-key so you can place the mouse closer to your body, reducing painful “over-reach” Functions keys are located in the number row and accessed via the Fn Key for reduce reach and enhanced portability. The Advantage360 Professional utilizes the Gateron Brown stem low-force tactile key switches. “Tactility” is a slightly elevated force around the midpoint of the stroke of the key which lets you know the switch is about to be activated. A tactile response is preferred by many ergonomists, because it cues your fingers that activation is about to occur and can reduce the frequency of “bottoming out” the switch with a hard impact.