Ballistic SG Black Silicone, Black TPU, and Black PC for HTC Thunderbolt - 1 Pack - Case - Retail Packaging Engineered Six-Sided 6 ft. high IMPACT DROP PROTECTION 2-piece, multilayer design - Features polycarbonate, silicone and shock-proof silicone bumpers for durability and protection Raised lips and corners provide protection from surface shock and scratches Reinforced Ballistic Corners that provide protection against cracked screens due to corner drops