Abstract: Some systems, devices and methods detailed herein provide adjustable restraint device maintaining a selected position of a person relative to a support structure, for example, to maintain a safe and customizable patient position during a surgical procedure or during medical transport. For example, in particular embodiments, the adjustable restraint devices can be releasably lockable at a customized position along the surgical table and can be conveniently manipulated to a curved or other customized configuration (e.g., to engage with a patient's limb) before being releasably locked into that particular customized configuration.