I just got a warranty replacement of my Speck Clear skin shell for my 13" MB Air.
Original was really clear, and cracked all over within first 2 months.
Easy online warranty claim, and free FedEx delivery of replacement. Though part number was same, construction was different, and no longer clear; now a translucent material.
Be sure to save packaging to retain security label to prove authenticity. Eveidently, lots of counterfeits out there.
Original was $20 closeout at Best Buy. Perhaps a defective batch from Speck.