Personalized Three Geocaching Rocks Long Sleeve T-Shirt. Geocaching Rocks text with three dancing rocks holding GPS receivers is a humorous geocaching design. Fun gifts for cachers at birthdays, holidays and geocaching events. 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