Start with 3 yards of 2 way stretch knit fabric. Get something of decent quality not too thin so you can see through it. I like the stuff Jo-Ann Fabrics carries.

Have a helper hold the other end and cut the fabric in half lengthwise. This should leave you with two pieces around 30 inches by 3 yards. Don’t worry about it being exact if your fabric is a little bigger or smaller in either direction.

Then with right sides together sew or serge the ends of the two pieces together. You should now have a long strip 30 inches by about 6 yards long.

Make a french seam by folding the ends to sandwich the tails of the seam into the sides. Sew down encasing the wrong side of the seam. This will leave you with a little flap. Now open up your fabric and lay the flat to one side and sew down the flap so it lays flat.

Next fold the fabric in half lengthwise and then in half the other way. With the folded sides facing UP and to the RIGHT like in my drawing above trim the raw edges so that you get tapered ends this will make the homemade Moby wrap easier to tie. (second drawing)

Now you are good to go. Since it’s knit it won’t unravel.