Update: This product is no longer being made.
The Evolution Ion is a One Size diaper that should fit babies 5-40 pounds.  There is adjustable elastic in the waist and legs.

Ease of Use ✩✩✩ The Ion is a One Size system using adjustable leg and back elastic. It is a side snapping diaper with 3 snaps per side, so you don’t have to adjust the waist elastic every month; you get it fitting well on the tightest snap then have 2 more to grow before needed an adjustment. In the video I show you that it is easiest to adjust this type of diaper by laying it over a cover that already fits your baby. It takes much of the guesswork out! After getting the right fit it is an easy diaper to put on and having less snaps to choose from works great for dads! The diaper needs to be stuffed, or you can choose to lay the insert in if you prefer. The insert is contoured so it can be a little harder to stuff but you get used to this quickly.

Bang for the Buck ✩✩✩✩ An Ion will cost you 25.00, which is on the high end of OS diapers. I would be willing to pay this price considering how well it has worked for us and how much I love the trimness. Plus they have some cute prints, but I would wait on those.

Performance ✩✩✩✩✩ I adjusted the diaper blindly at first, and surprise, had a leak our first use! When I filmed I resized based on a cover and it fit my son like a glove. From then on we have only had one other leak, this one related to not using the larger insert so it wasn’t absorbent enough for him.

Fit ✩✩✩✩✩ I wasn’t able to test this on a newborn so I can’t say that it definitely fits one, but for us it has fit so well! The trimness is so impressive, and for those of you who like a clean looking diaper this one has a very clean and trim looking front! The diaper lays flat on the tummy. The back will look gathered since you adjust the waist elastic within. Funny enough, I am not a huge fan of side snapping diapers or button hole elastic adjusting diapers, however, this one has won me over!

Overall: I think why I like this diaper so much has to do with the fact that I got a good fit early on and could stop fiddling with it. My favorite feature is the adjustable waist, it means no long tabs with 5 or 6 snaps to deal with. They use Cool Max fabric as the lining, which is much like the athletic weave material for work out clothes. I don’t feel as if it wicks moisture away as well as Suedecloth or Microfleece but it is made from recycled materials and is stretchy, making stuffing the pocket easier. I tried both inserts and loved their shape and trimness. The biggest negative was that the print I tried, Rockstar, which is adorable, started wearing off. Stacee is working to fix this issue so for now I would buy solids until that is addressed. I can’t wait to see the new and improved prints though.

Where to Buy: EvolutionDiapers.com or MadisonOrganics.com

I was sent 2 Evolution Ions for the purposes of this review. All opinions are 100% my own and genuine. Not other compensation was received.