What does Raised Back Pocket mean?
A 3-D like effect whereby after a pair of raw denim is worn and faded, the midsection between the stitching of the top of the pocket is elevated.
Heddels explains Raised Back Pocket
Similar to Raised Belt Loops, a Raised Back Pocket fade is a pattern where the top of the back pocket appears to be raised. The shape is more noticeable with fabrics from select brands such as The Flat Head.
See below for an example of Raised Back Pocket fades on a pair of The Flat Head (model, wear, and washes unknown):