What's the difference between the Pixie 3.0 and 4.0?

Our best-selling Pixies are a staple in so many homes. They're a great, premium, affordable reusable nappy. 

But what's the difference between the 3.0 and 4.0?
See our quick infographic below. 

For those of you who have been around for a while, the new 4.0 Pixies are back to the same sizing as the v2 release.