Personalized Blue Lost Mind Youth T-Shirt. I've lost my mind, but, that's OK. I've marked it with a waypoint. Uh-oh, low battery! A humorous gift design, for the loved one who has lost their mind over geocaching. Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.