ZTE Compel / Z830 Case, ToPerk (TM) Cyber Grid Armor Case + Free HD Screen Protector & Stylus Pen As Bundle Sale - Blue The corners are supported by air cushion technology which absorbs and disperses the force through the Silicon. Installation and removal is made easy with material free corners. A Dual Layer build made out of high quality polycarbonate (PC) and soft silicone that helps guard your device against scratches, dirt, minor drops, and bumps. Protruding borders keeps screen elevated when device is placed with screen facing surface. ToPerk (TM) Logo Stylus pen included