Both the Isabel 2.0 and 3.0 pants are the same except that the 3.0 version consists of 35% recycled cotton, 62% cotton, and 3% spandex. It's also more durable, and the hardware, including the zipper, belt stitching, and buttons, have been improved. The 3.0 also includes a spare button on the waistband and comes in a wide range of sizes and colors.