Abstract: The invention relates to an ergonomically designed pillow having a shape that offers support for a user's head and/or limbs through a portion of their range of motion with respect to the user's torso without having to reposition or reconfigure the pillow. In the preferred embodiment the pillow has a substantially fixed radius curved shape designed to correspond to the rotation of the head with respect to the shoulders. Therefore, the head of a user resting on their side can be comfortably supported on the pillow and will be similarly supported as the head is rotated forward and backward with respect to the shoulders. In addition, this substantially uniform curved design enables the pillow to be rotated forward or backward and provide the same head support while also providing support for the user's arms or back, respectively.