The BB-slen is a very comfortable woven sling, made in a Fair Trade project in India using the best weaving technique for slings. The BB-slen comes in 4 sizes: 260cm, 460cm, 490cm, 560cm.
The short version can be used as the BB-sling does. The choice between a 490 and a  560 depends on your size and how you want to carry your baby.
The size 560 fits all and allows all positions.