A support device adapted for improving the ergonomic support for the arm and wrist and forearm of a user of computer-related input devices is provided. The support device may include a body interconnecting a base to two spaced apart wing supports oriented at latitudinal and longitudinal support angles relative to the supporting surface on which the devices slides. Each wing provides waterfall edges along its periphery. The void between the wing supports, the supine triangular shape, and the waterfall edges facilitates a more neutral position of the forearm and wrist supporting between the two wing supports, reducing pressure points there along, and avoiding direct pressure to the carpal tunnel canal and mid-forearm regions that house anatomical structures that may be impacted by high pressures. The latitudinal support angle can be adjusted.