OtterBox Defender Case for HTC One / M7 (Glacier) Our Defender Series case features three layers of defense, including a durable inner polycarbonate layer, outer silicone layer and built-in screen protector. The two-piece inner layer is built from high quality polycarbonate that snaps around the device to create a secure protective layer. A screen guard is built into the inner layer to protect against scuffs and scratches. The outer silicone layer wraps around the inner layer to create a unified defense against oopsies like bumps and drops. Compatible with: HTC: One, M7;