I love Zutano cozie fleece.  If money were no object and they had more styles, I'd dress my daughter in it exclusively.  And these booties are the absolute best thing to put on your baby's feet.  So warm, and STAY ON and easy to put on and off.  And AORABLE.

For sizing - these booties are very small.  My daughter is exactly 50% percentile, and there's no way these fit her anymore at 3 months.  Buy these knowing that they will fit just for the early newborn weeks.  I also have the 0-6 month size booties .... these are NOT them (I thought maybe they were because I heard that Zutano did a resizing, now calling all their 0-3 stuff 0-6).  Anyway, so I have the 0-6 and although those are big and floppy on a newborn, because of the snap closure, they probably will stay on just fine.  So I would recommend most people just get 0-6 because those are ok for newborn but will also last you a few months.  These 3m sized booties are good if you really just want a snug fitting bootie for the first few weeks, or if you have a preemie, etc.

The 0-6 booties I have for my 3-month-old daughter don't even have all that much room in them left.  I think Zutano tends to size small in a lot of their accessories.  It's certainly true of their hats.