50% Off Almost Everything Sitewide at ZAGG with code MEMDAY09 at checkout.  This is valid through 5/29.  Shipping is $2.99 in most cases.  ZAGG sells a protective membrane called invisibleSHIELD that protects electronic devices.  Note that this coupon does not work in the Inventory Blowout section but appears to work on everything else.  Here is a screenshot for your reference.  For an example of the purpose it serves, take a look of this video demo.
Originally posted earlier, this is just a friendly reminder as this deal is expiring soon.