Infinity Sweater sewing pattern for girls and teens. I actually hate the way these look, especially when people flop the long end up over their shoulder, but I think it would be pretty handy over a baby carrier.
Style with versatile fabric - makes ponchos/shrugs/scarves/jackets/shirts. Poncho: Put head through center to wear at an angle, v at front, or sideways. Shirt: Wrap back & snap in front, then drape neck over snaps.