I LOVE how soft and cozy these are. The medium is working great on my fast growing 7 week old, 13 pounder. We started with these at 4 weeks over one size flats and they were a great fit then, too. As someone who is a CD veteran but new to wool, I came in a little unsure about lanolizing and my confidence in the magic of wool being leak proof. I did have to lanolize once but now things are leak proof and I can tell my baby's skin can BREATHE through this cover, so unlike my PULs. I feel so grateful to say I'm giving my baby the best and safest diapers! Looking forward to trying the longies and shorties now that I'm totally won over!