The HUSH Hat is a noise softening Hat for babies. It is perfect for use during nap time, to keep babies sleeping soundly through household sounds that constantly startle them awake. It is also great to be used outside the hone to keep your baby comfortable & protect their hearing in noisy everyday settings such as restaurants, air travel, sporting events, worship services & family gatherings. The HUSH Hat is NOT sound proof, rather it filters out sounds to avoid overstimulation and make environments comfortable and safe. The HUSH Hat fits slightly different than a regular hat. It is longer in order to completely cover the infants ears, so it may require a little adjustment on your end. When placing on the hat on your babies head, first knead the foam for 5-10 seconds to warm it up. The foam has optimal sound absorption when it is warm and in contact with the skin. The warmth allows the foam to conform more closely to the baby's ears. Babies' ear placement ranges greatly so the foam is also adjustable, allowing you to position it in the best manner. If you feel the HUSH Hat is too low over the babies forehead you can reposition it by giving the back of the hat a little tug.