Abstract: The invention relates to the field of physiological monitoring of ambulatory patients. More specifically, the invention is a vest to be worn by young patients (children) wherein a pouch on the backside of the vest is provided for the placement of a Holter, or similar, physiological monitor. Placement of the monitoring device in this manner makes it difficult for a child to disturb or otherwise manipulate the device. The vest is placed over the child's head and attached via straps that run under the child's arms. In one embodiment, the straps are lengths of material that can be tied in a double-knot, making it difficult for the child to remove the vest. Straps of this design also allow the vest to be easily fitted to children of different sizes. In yet another embodiment, the pouch consists of a series of elastic-like straps.