QuiltE

It's great that you are making the quilts.

While your friend works in the NICU, and knows of their need ... you should also check with the other hospital folks regarding any requirements. Such as fabric, batting, size, etc. It's best to check up front instead of a possible disappointment after you make them.

Another batting possibility you may want to consider would be flannelette. Because the quilts drape nicely when it is used, it would be nice as a wrap and not be too bulky on the wee ones.

If the hospital does not have set standards (aka rules!) .... maybe make 2 or 3 as trials ... and get the feedback from your NICU friends and her colleagues as they use them.

Good Luck!