Abstract: A soft arm support and protection device for use during a medical procedure when a patient is lying supine or prone. The device may be made from a soft neoprene material which is positioned under the patient's body. Enveloping leaves of material wrap from above and below the arm to afford complete and even support. The mating surfaces of the leaves are fitted with wide fastening material to allow secure fixation of the arm without pressure points. The dimensions allow for protected and stable vascular access sites with the option of adding additional foam padding about such sites and to vulnerable nerves and bones. The device also allows for radiologic imaging and can be quickly undone in an emergency for rapid access. The device is made of material which is hypoallergenic and durable. It can be manufactured in either a disposable or reusable version.