I wasn't going to get this because the size is listed as 14 " x 25 " x 12 " and the ends aren't double zippered.  The zippers work very well.  I ordered the black one and it came with a tag listing its size as 25.5" x 11" x 12" (I'll post a scanned image of the tag).  The pocket on top of the double zippered top opening has its own zipper, felt on the bottom and water proof material on the top.  My iPad 2 slips in perfectly, which is nice for bringing to the gym.  The main compartement has another small zippered 7"x3" pocket for ... whatever.  The inside of the long side pocket has a key hook.  One end of the bag has a vented compartment for shoes or dirty clothing.  The side expands into the main compartment as needed.  It also has a handle that makes it convenient to lift into a locker.  The other end of the bag has a mesh for a water bottle and stuff.  The compartment on that end does not expand into the main compartment.  I use it for my toiletries.  I kind of wish it had the extra 3" of girth as listed, but this size is working fine.  BTW - I tried to change the color less than 15 minutes after ordering it on a Sunday, but the shipper, eBags on Monday said they couldn't do it because it already shipped.  They did offer a free return.  I kept the black one.