Trident Case Aegis Series for Barnes & Noble Nook Color - Black The Aegis offers complete protection with creative design to keep the Nook Color 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 Nook Color - with a hard polycarbonate shell on the outside. This design gives the case a unique look and feel while maintaining i The Aegis for Nook Color 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 Nook Color from everything including light bumps to violent drops with a unique shock-absorbing design.