Premium Leather Case with Swivel Belt Clip Screen Protector for Apple iPod Nano Nano-Chromatic 4th Generation 8gb 16gb (Nano Chromatic Not Included), Black
This case for the nano is very good, especially for athletes who like to clip to a belt or to shorts when you work out.  Light and sturdy, volume can be changed because the circle - click wheel is not covered in plastic.  No problems with coming loose through even strenuous workouts.  I recommend.