Proporta has announced its new Dual Skin Silicone Case line for the iPod classic, touch, 3G nano, and iPhone, as well as the new Splash Proof Sports Kit for the 3G nano. The Dual Skin cases will feature two layers of impact-resistant silicone in a variety of colors, and will also feature cut-outs for access to the iPod’s ports and controls. They are expected to sell for $22 each when they are released. The Splash Proof Sports Kit for the iPod nano (with video) comes with a Dual Skin Silicone Case, a polycarbonate clear screen protector, an adjustable armband, a lanyard attachment, a splash-proof base that hooks over the lanyard attachment to protect the headphone port from spills, and an optional belt clip. It is expected to sell for $40. Proporta’s Dual Skin Silicone Case line and Splash Proof Sports Kit are expected to be available in the coming weeks.