An occupant restraint system for a vehicle seat operatively mounted in a motor vehicle may include a restraint web operatively coupled to at least one of the vehicle seat and the motor vehicle, an elongated sleeve received on and at least partially about the restraint web, and a sleeve position adjuster coupled to the sleeve and including an actuator normally engaging a portion of the restraint web to fix a position of the sleeve relative to the restraint web and responsive to actuation thereof to disengage from the restraint web to allow the sleeve to be moved along the restraint web.