I have a friend that has put together a booklet of different types of slings, how to make them and how to wear them, and that one looks EXACTLY like her snake sling!! I'm so surprised to see it!
I would be a great sling. I used to put my baby in my snake sling and go workout at the gym with him on me. I used to get such a kick out of the big muscle bound body builders coming up and cooing at him. :LOL
I just used a stretchy cotton-poly blend of fabric for my sling. It works very well and holds the baby quite secure. Although I would like to point out that the model in the picture has used a different wrap technique than my friend reccommends and it doesn't look quite as secure. Also, the baby is much too low down. A wrap that loose would give me a back ache in about 10 seconds.
The best thing about making your own simple slings is that you can make skirts and pants out of the same fabric and voila! You have an outfit that turns wearing your baby into an accessory.
When my kids were in slings, I had no less than five slings to choose from, depending on what I was wearing and what I was doing.