Personalized Green Lost Mind Youth Long Sleeve 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. youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)