The Basic is not very expensive compared to the others and it's very good to get started and ensure that the baby accepts portage. The fabric is elastic and that's what I wanted.
Please note, Basic JPMBB are shorter than other JPMBB. It is fine for me (1m69 for 61kg) but a bit tight for my husband a bit beefier.
Joined with a small booklet that explains two basic knots (though again I advise to be accompanied for the first time to understand the baby's physiological need.
Only flat, with the classic knot, little chip (Month) hot quickly catches with 3 layers. It is therefore necessary not to cover baby.
To conclude: a scarf reasonably priced, good quality and respects baby's physiology (unlike some baby carrier sold commercially as BabyBjorn).