Rhino Shield is a clear coating for Gorilla Glass (used in most smart phones) that was developed from a Kickstarter fundraising effort.
Rhino Shield is the product of Cambridge University spin-off company Evolutive Labs. It's made from an impact-dispersing "custom-formulated polymer" that is also highly transparent (it has a transmission rate of over 95 percent), scratch-resistant, and that features an oleophobic coating – that means it repels fingerprints and other oils.
One multi-layer sheet is 0.29 mm thick, and can reportedly be applied to a phone's screen without creating air bubbles or leaving sticky residue. The screen's touchscreen functionality remains intact.
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects