Silicone Skin Sleeve PURPLE Rubber Soft Cover Case for MOTOROLA WX430 THEORY (BOOST) [WCF874] Soft case with rubberized smooth touch. Made of durable, high-grade environment-friendly Silicone. Designed to offer all-around external surface protection to your phone. Provides anti-slip grip with a soft, more comfortable feeling to hold Smart design, gives you total access to all functionality and buttons.