The Second Skin is Case-mate great line of sporty cases for the iPhone 3G. These cases are antimicrobial to help keep the germs away. Purchase includes 1 black case that can be used alone or with any of 3 interchangeable accent colors. It"s like getting 4 phone cases in 1. Mix and match colors for 4 unique looks. Each kit includes 1 base case and 3 interchangeable accent pieces (red, blue, pink), a screen protector and a micro fiber screen cleaning cloth.