Snap-On Protector Dual Layer Hybrid Design Case for Apple iPhone 4/4S - Blue/Black Layer 1: Durable silicone mid-layer Layer 2: One piece custom molded perforated polycarbonate shell Offers the best grip sensation in the market while offering overall protection just like a hard case,Compatible with Apple iPhone 4 / 4S All the button elements are meticulously engineered for easy access and ultimate tactile response ship by USPS first Class with tracking Number, Estimated delivered time is 7-13 working days,Safely and quickly.track by USPS web.