One of these:
https://www.66pix.com/is.php?i=31476&img=jacob1.jpg
? x
My sister in law leant us her BabyBjorn carrier and I bought a coorie pouch sling (similar to the one in your picture but made of fleece and it's like a tube shape that you fold in half so no front or back etc).
DH preferred the baby carrier and I preferred the sling. This time I'll use the coorie pouch but found the material had too much give in it so I'm also looking at Emilia's slings as the design looks great. I think they work out about £22
Yer my OH wants a normal carrier ... hmm