iPod Nano 5th generation 5G Diamond FleX Silicon skin case cover compatible for iPod Nano 5th Gen 8GB, 16GB newest model (Black) + Includes Nano 5 Screen Protector Guard + a 4-inch eBigvalue TM Determination Hand Strap "Case is Semi Transparent"
I bought these as a replacement for the ear buds that came with my iPod.  These are comfortable and do keep out more outside noise, however they seem to overplay the treble, and have almost no bass response.  The treble is so emphasized that it hurts my ears at even medium volume.  I do highly recommend this vendor, (s)he shipped it almost immediately.