I Don't Shave for Sherlock Holmes
iPhone & iPod Skin
Skins are thin, easy-to-remove, vinyl decals for customizing your device. Skins are made from a patented material that eliminates air bubbles and wrinkles for easy application.
To which Mary replies: "You should put than on a t-shirt."
(From BBC Sherlock Series 3 Episode 'The Empty Hearse')