It is a thumb sucking prevention product that can help getting rid of preschoolers?? bad habit of sucking thumb. It also prevents the secondary infection such as abnormal finger (distortion), erosion, blisters, bruises, skin peeling, infection, callus, or skin disease. In addition, it enables teeth to grow properly, thus preventing intraoral structure transformation and malocclusion (protruding teeth, gap between teeth, misaligned tooth, irregular teeth, and open bite) beforehand. The air tunnel formed inside the finger cap, the air circulating part on one side, and the air circulating groove on the bottom allows the air to circulate smoothly around the finger. And this prevents salivating and minimizes skin irritation. Since the child sucks while also inhaling air, it can correct the child??s habit of sucking thumb out of dissatisfaction.