A good friend of mine is having a baby this summer. When I found out she intended to breastfeed I offered to make her a nursing cover. My sister-in-law made one for me and it's been such a lifesaver. It actually has two layers, the swirly purple hearts is a cotton and there's a lilac flannel underneath. The cotton was a bit too thin for my comfort so that's why I added the flannel layer. This was actually my first time basting layers, I free-handed the swirls and I think they turned out ok for my first time.
The tutorial I used (there are a few out there) found here: Little Birdie Secrets