Amzer AMZ94929 Hard Snap On Shell Soft Silicone Skin Hybrid Case Cover for Motorola RAZR M XT905/DROID RAZR M XT907 - 1 Pack - Retail Packaging - Aqua/ Purple First layer is Silicone Case protecting full device. Second layer is a perforated Polycarbonate hard shell that protect back of your device. The smooth outer back shell provides sure grip to keep your Motorola DROID RAZR M from dropped or bumped. Plug your charger, cable or headset without removing the case. Easy installation, just snap on your Motorola DROID RAZR M without any tools, also very easy to take off, no tools needed.