Tuff-Luv Slim&Lite Silicone skin case cover for Sony Walkman NWZ-S540 series (NWZ-S544 NWZ-S545) - clear
This cover is a nice way to protect my new player.  It fits this style very well.  It seems durable.  I would recommend it.  I may actually buy another to have as a backup.  Especially for the price.