Incase has introduced its new Sports Armband Pro and Slim Sleeve for the fifth-generation iPod nano. The Sport Armband Pro is made of breathable, lightweight neoprene with reflective details, and features a removable Velcro tab for headphone management, an integrated clear cover for the nano’s face, and access to the nano’s headphone jack while in the case. The Sports Armband Pro is available now in black and sells for $30. The Slim Sleeve…