Very cute designs and patterns. I love the zipper, it's sturdy and allows us to change our little man much quicker. The material is thin, so dark colored rompers will be seen through, if the zipster is light, like this one is. Also, in the deep winter, he'll need more layers. But the outfit is super cute! In this photo he's around 7.8 kilo wearing the 3-6m size, we'll probably get a few more soon, as he's growing quite quickly!