The best-selling Duo includes built-in magnets designed for use with MagSafe chargers and accessories. Proving two is better than one, Duo combines minimalistic design with maximum protection. This two-piece protective case offers exactly what youd expect from the pioneers in dual-layer technology; slim, easy-handling design with proven protection to defend against annoying bumps and drops that happen to everyone. Our innovative Impact Strut technology elevates drop protection to 12 feet, and a special new antimicrobial treatment prevents 99.9% of surface bacteria. Duo is the next evolutionary step for dual-layer defense.