iSkin Duo for iPod Nano - 2GB / 4GB (Dual Layer Silicone Protector): White (Outer Skin) / Blue (Inner Skin) Unique dual layer (inner/outer skin) design for maximum all-round protection Micro-goosebumps and a non-slick surface gives you a sure grip on your iPod nano even with moist hands Integrated both docking and earphone port cover iPod nano comes in four color combinations that include glow-in-the-dark protects your screen with ultra-clear screen protector