Proporta has announced three new protective cases for Apple’s second-generation iPod shuffle. The company’s Steel Sleeve (shown) features metal construction and is available in metallic black, metallic purple, metallic blue, metallic green, metallic pink, metallic red, silver and white. The Silicone Sleeve is made from silicone and comes in white, pink, blue, black and green. Proporta’s Crystal Sleeve is made of polycarbonate plastic and comes in clear, black, blue, pink and red. Each case sells for $9 and will ship before the end of the month.