Bit of a niche one here - a twin ring sling! Here's a quick how to - looking at setting up, threading and loading in your babies!
Realised I never mentioned how to get out - just loosen one pouch carefully to take one baby up and out and then do the same on the other side. You could leave your ring sling on if you're confident you'll use it again shortly!
I used a lovely Malishastik twin ring sling here - 50% cotton, 50% linen.