Batting & Burlap

I want to do a bit of DIY mid-range sound proofing (absorption/ diffusion) Read info on a couple of sites.

I could not figure out these two materials, batting & burlap.

I read batting is used to wrap on the fibre glass sheets so that the loose fibre does not fly away. That's very essential, especially with kids at home. But where could I buy it from? Is there a local/indian name for it? Is there an alternate to batting, easily available locally?

Burlap, is it really the gunny bag material? That would look awfull! Again, where can I buy it from?

Could I use speaker cloth instead of both these? Is speaker cloth economically priced? Where could I but it from?

Thanks very much.