A lock for an adjustment cord of a wearable article includes a body defining a first passage extending through the body from an entrance opening of the body to a first exit opening of the body, and the body defining a second passage extending from an intermediate portion of the first passage to a second exit opening of the body. The body is configured with a segment of the first passage extending from the intermediate portion to the first exit opening in communication with the second passage. At least a portion of the second passage is narrower than the first passage so that a portion of the cord disposed in the segment of the first passage is movable relative to the first passage when tensioned and is repositionable to the second passage where the cord locks to the body and retains tension. A wearable article including a lock is disclosed.