As our nights are getting colder, I really need a hat for my baby to sleep in. Unfortunately, it seems that many hats run small or shrink in the wash, so I'm afraid to order one without a recommendation. I need it to be warm, soft so it's ok to wear at night, not to small, but also snug because he likes to whip his head back and forth at night.

Any recs? I need one that's 6-12 months and true to that size.