You are buying the Lululemon bag shown in the pictures. Great large size for a weekend away or for your gym/yoga clothes/towels. This is a cool design - the zipper ends on the top fold down and snap into place for a more "square" look. Look at all of the pictures and you'll see what I'm talking about

With the sides snapped down, the bag measures approximately 18 x 13 x 11.

The bag is a very very dark gray color - practically black (but it's more of a charcoal black, not a deep dark black). 

It is a 100% cotton material with thermoplastic embedded in the material. It is VERY heavy duty!

Original shoulder strap included. 

SEE PICTURES!!!!