You can make your mad March Hare costume even madder by adding this adult March Hare hat. The Alice in Wonderland accessory is made of 100% polyester and consists of a wild mane of hair. In addition, the interior of the hat is lined with cloth and has a size adjuster, which features a Velcro strap with an attached elastic band that stretches to create the perfect fit. Feel free to become mad as a march hare with this adult March Hare hat.