Ring slings are very versatile and can be used from infant to childhood (48lb or 22kg for the Luna Ring Sling) with front and hip carries. They are great for easy ups and downs once they are set up, and I have to say that the ring sling was my preference for both my newborns so I may be a little biased.
Ring slings spread the weight well but only over one shoulder, so might not be for everyone.
Click below to find out which ring slings we have at the sling library