Currently a myriad of devices are available for immobilization of the injured or postsurgical upper extremity. Some of these devices are straightforward and easily used, but some are more complicated and require more familiarity for their successful application. However, even simple devices have the potential for misapplication and thus prevent their benefit to the patient. This article is the first in a 3-part series. The goals of the series are (1) to present and review several devices on the market used by shoulder surgeons to immobilize the upper extremity, and (2) to discuss proper application and precautions of their use. It is intended that this series will benefit nurses, therapists, and trainers involved in the use of these devices.