Personalized Blue Lost Mind 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. Pre-shrunk 100% cotton 6.1 ounce long sleeve t-shirt. Double-needle stitched neckline and sleeves. Quarter turned. Shoulder-to-shoulder taping. Adult: S, M, L, XL, 2XL, 3XL