NIPIT is the only device to break the habit using the elbow. It does not cover any part of the hand. Kids use their fingers to develop and play but can't comfortably put them in their mouth. Ages 2-7, right or left arm, fully adjustable (see sizing chart). STOP hand from comfortably reaching the mouth. STOP thumb sucking or finger sucking in just 5-21 days! Nipit can stay on when eating or washing hands. Kids can wear it all day and night. Thumb Guards and finger guards collect slobber and germs!