They are the most used type of retainers for upper teeth. This type of retainer is made of bendable wire and acrylic or plastic. The most noticeable feature of a Hawley retainer is the bow wire that runs across the front of the teeth, and the acrylic is molded to fit perfectly inside the mouth. The plastic body remains well hidden. Sometimes it’s constructed using plastic that has bold colors or a personalized design.
Pros: it is adjustable and can be removed for cleaning. Also can be repaired (either its wire or plastic components).
Cons: It is very noticeable. You might lisp at first when wearing it.