1 It feels really nice in hand the back part is made of two different material the best; 2 The cover is made of a combination of carbon fiber and silicon it is resistant to abrasion but soft at the same time. Made of the same material that covers many yachts; 3 The frame is made of another materialhard PC plastic cement that envelopes all the phone border at the same time its hardness protects the phone when it falls especially around the corners; 4 The back case covers and protects the phone´s back and screen at the same time its border are just a little bit higher in the front than the screen so when the phone falls the cover takes the hit not the screen protecting it; 5 The back cover is full of little holes that serve two purposes; one they help dissipating heat two they give the phone and anti-slide design.