Huge and heavy
Patagonia's infant sizing runs super large, be forewarned. I bought a size 3M for my three month old, and was shocked at how HUGE it is. She's my first child and i'm not sure how fast she's going to grow, but compared to some of her other clothing, (Carter's 3M fits her perfect) She might fit into it better at 6 months. BUT i have not washed it yet and so i suspect that it could shrink maybe a little.
Also I could only find midweight capilene. The material seems too hot for a summer hike, and maybe better suited as a base layer for winter OR a sleeper for summer camping.
I live in utah and its hot in the summers. I was looking for something lighter and cooler for day hikes, to keep sun and bugs away. It was also not as soft as I had hoped it would be. I would much rather put her in a lightweight bamboo one piece than this.