To wear as an infinity scarf: Fold each side of the scarf under 1/3 of the way. Put the scarf around your neck, and loop it around once to wear as an infinity scarf.
To use as a nursing cover: Unloop the scarf so that you have one long loop around your neck. Place your right arm (to nursing on the left side) through the loop. The nursing cover will now be across your front and back similar to wearing a sash. Pull the fabric down from your shoulder to open the fabric to its full width. Continue to pull the fabric down around your chest and back for maximum coverage.