My advice is to ask your ortho about getting at least the bottom one permanently. You cant even see it, it's just a wire that you wont feel across the back of your bottom front teeth. It's glued on there really good so you can't feel the wire, it just feels like the backs of your teeth. I wish I had gotten my top one done that way too, because I gave up wearing it after a few months. My teeth spread some, but not completely. It can be a pain to floss if you do get them that way, but it gets easier quickly. When I can after college, I'm probably going to get invisiline or something to move my teeth back and then get a permanent top retainer.