CTA Digital Black skin case with armband for Zune CTA DIGITAL ZU H1BL Black Silicone Skin Case. The CTA Skin Case for Zune is a form fitted silicone case made to carry a Microsoft Zune digital media player. It safeguards the player from scratches, knocks and dust while still providing free access to all the controls and connections. A vinyl window shields the screen from harm. An arm and waist belt band with adjustable waist strap plus a belt clip are included.