Personalized Invincible Techie Dark Products Long Sleeve T-Shirt. IT invincible techie is a humorous gift design for computer geeks, programmers and IT personnel at birthdays, holidays and graduation. 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