Looks like the new Flash costume has lightning seams for the DC Comics Relaunch in September 2011 (see large pic at end of this article)
In addition, at the recent Calgary Comic & Entertainment expo, DC revealed the new way in which the Flash costume envelopes Barry Allen. Looks like the costume is assembled differently:
“….Little chunks of pieces come out [out of the ring] which are the red parts of his costume and then it all forms on his body. So that’s why there are inseams.”
More on that here at The Daily Blam!
DC’s new Flash pic is below.