I purchased a ring sling and it has been an absolute lifesaver! It's so easy to put the baby in the ring sling when I need to pick up her big sister from Kindy and not have to juggle several things (bag, baby, older child).
I was using a stretchy wrap previously but it was getting too hot for baby and took too long to put on. The ring sling goes on so quickly and is very light, ensuring baby doesn't get too warm.