I love the Baby Deedee sleep sack I got my LO. It keeps her so toasty and she sleeps so well in it.
If you don't already have one, you really need to get a sleep sack! They're the best!
Which sleep sack do you have? How much do you love it!
*edit: http://babysteals.stealnetwork.com/
they have Halo sleep sacks on sale!