Green scapulars are mostly for converting people to Christianity or for helping someone overcome an addiction. It’s something you wear under your shirt. It’s a cotton necklace with strings longer than the chains of a necklace. You can use it to pray for yourself or for someone else.
First, before you buy the green scapular, consider why it is you need it. In the case of an addiction, think strongly about giving up the addiction. Imagine yourself wearing the scapular without the addiction.
If you are trying to convert someone to the faith think about what good it would do if they followed Christ.
Next, buy the green scapular and get it blessed.
Remember that the St. Jude version of the scapular has a picture of Saint Jude on it. He is seen as the “good apostle” (whereas Judas is seen as the “bad apostle”). He wears a gold medallion with the countenance of Christ. He keeps an image of the most sacred face of Jesus close to his heart because he, as a good apostle, kept Jesus himself close to his heart.
Just remember that if you are a faithful Christian you will eventually gaze at the countenance of Jesus. Pray to St. Jude that he will intercede for you to help you stay on the path to stand next to Jesus and see him face-to-face.
St. Jude is also depicted on the scapular and on most depictions of him with a flame over his head. This is because he was present at Pentecost (when the Holy Ghost descended upon the early church). The Holy Spirit is often symbolized with fire. St. Jude was one of the first Christians to be blessed with gifts of the Holy Ghost. Know that the Holy Spirit will guide you to overcome your addiction or will soften the heart of the person you are trying to convert.
Finally, wear the scapular. Be the person you want to be. Wearing a devotional garment under your clothes helps to perfect your faith. It will remind you to not let your addiction get a hold of you. To truly live a life of perfect faith, you must overcome desires of the flesh. Even venial sins can stop you from gazing at the face of our Lord.
You don’t have to wear it all the time. You can take it off to go to sleep. If the scapular is for someone else you can leave it somewhere in their room (if you can) or you can just leave it in a safe place.