These are very nice amphibian-style shorts.

About amphibian-style shorts.  This relatively new style blends cuts and styles associated with traditional street shorts (e.g. your typical khaki short or cargo short) and construct them with materials more commonly found in a board short. The result is a short that you should be as easily able to wear around town as to wear in the ocean or pool.

About these shorts.  I can directly compare them to a pair of Hurly Phantom amphibian (standard, not Nike quick dry variety) and Quiksilver amphibian shorts.  Of the two they most closely resemble the Hurley shorts, which I quite like.  Differences between the two:
* The cuts are very similar.  While both are the same size the Hurley is larger in the waist while the Bilabong is snugger.  In fact all measurements of the Hurley's are a bit bigger with one exception.  The crotch is slightly longer with the Bilabong's.  It isn't enough for me to ding the Bilibong's, but I do prefer the slightly less baggy crotch of Hurley's.
* Material.  The feel of amphibian shorts can run from quite light and plastic-y (very boardshort-y) to almost cotton-like.  The Hurley's tend to lean lighter and a touch plastic-y while the Bilabong's lean a touch heavier and more cotton-like.  This isn't a night and day difference, pretty subtle actually. And while both are still very light and wearable, I do prefer the feel of the Bilibong's a bit more for walking around.
* Color.  They have a bit of patterning reminiscent of some Quiksilver designs.  A very subtle check pattern which I like.

Summary:  I really like these and prefer them just a bit over my Hurley's which are also really nice shorts.  Looking forward to wearing these a lot more this summer.