Abstract: A restraint device and associated method for securing the wrists of a subject, the device comprising a first wrist restraint and a second wrist restraint, each wrist restraint having a loop with a variable circumference, wherein each wrist restraint transitions between an inserting configuration, and a secure configuration, wherein the circumference of the loop in the inserting configuration is greater than the circumference of the loop in the secure configuration, and a cinching portion couplable to each wrist restraint to removably attach the first wrist restraint and the second wrist restraint, wherein upon increasing a distance between a first wrist of the subject inserted into the loop of the first wrist restraint, and a second wrist of the subject inserted into the loop of the second wrist restraint, the restraint device transitions from the inserting configuration to the secure configuration.