With Odyssey we have utilized brand new material combinations and a radical 3-piece construction to protect your iPhone. From the tried and tested ADSP (adaptive dynamic soft polymer) inner casing, to the super tough polycarbonate UltraFrame and the scratch resistant hydro polymer back panel; its fair to say Odyssey is a protection solution like no other. In order to offer your iPhone ultimate protection Odyssey applies a 2-layer construction where the semi-soft ADSP inner casing acts as a durable shock absorber to the tough polycarbonate UltraFrame outer shell. In addition to all the durability, Odyssey also employs a scratch resistant hydro polymer back panel to offer a firm grip and also provide a barrier to natural abrasions to the UltraFrame - Odyssey not only looks after your iPhone, it looks after itself. It"s also worth noting that every Odyssey ships with 2 color specific back panels that are interchangeable to suit your taste.