Our Impact Shield with Self-Heal screen protector for HTC One M9 contains an advanced multi-layer system. A hard top layer spreads the impact over a wider surface area. A second layer, BulletShield™ featuring BASF polymer found in bullet proof glass, absorbs and dissipates impact. A final third soft layer dampens force and further absorbs impact protecting your screen with the most intelligent impact protection yet. An advanced self-healing anti-scratch layer created with reflowing polymer completes the world’s most advanced screen protector. Features: – Advanced protection with multi-layer system – Easy bubble and glue-free application – Self-heal Anti-scratch layer created with reflowing polymer – Perfect optical clarity and non-UV yellowing