What kind of material do I need for a mei tai style wrap that is strong enough for a 15kg 3 year old, but is also light weight and breatheable? Is that a ridiculous request? Lol

I'm a bit lost with all the different styles and most of them seem to be geared towards newborns.
I just want the easiest thing to sew (I have NO experience)and suitable for my boy.
Is mei tai the right one??? Soo confused.

Moby wrap? I found a simple no-sew moby wrap...