Trident Cases Aegis Series for HTC Thunderbolt - Blue The Aegis offers complete protection with creative design to keep the Thunderbolt safe and unharmed without compromising its advanced functionality. Unlike Trident Case's other series of cases, with the Aegis the silicone layer is on the inside - in direct contact with the Thunderbolt - with a hard polycarbonate shell on the outside The Aegis for Thunderbolt comes with a scratch and smudge-resistant screen protector keeping the screen safe without sacrificing responsiveness. The four corners of double-thick silicone insulate the Thunderbolt from everything including light bumps to violent drops with a unique shock-absorbing design. All materials are 100% RoHS compliant.