Our Behavioral Aversion Strip keeps the thumb/fingers out and away from the mouth. your child attempts to put their thumb or fingers into their mouth while wearing any Handaid, the Behavioral Aversion Strip stimulates the chin or lower lip. This prompts an unnatural feeling for your child, causing them to pull their thumb out of and away from their mouth. The Handaid Glove is engineered to keep the thumb or fingers away from the mouth. This prevents exposure to harmful bacteria and germs that other products made from plastics will allow. By keeping your child’s thumb or fingers out of their mouth, we break both the physical and emotional cycle of thumb sucking.