Personalized Nice Until Proven Naughty T-Shirt. Nice Until Proven Naughty. Santa Claus is watching, but everybody needs a little breathing room. Funny Christmas gift for everyone, whether they're naughty or nice! Everyone loves our Custom T-Shirts! Wardrobe essential for looking good, 24/7. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar. Shoulder-to-shoulder taping. Double-needle stitched sleeves, bottom hem and front neck. Note: greys are a cotton/polyester blend.