DIY Inserts?

We've just received our new medium fuzzis. They seem really good but the mf insert isn't absorbant enough unless I change Liam's nappy every hour or so . So I was thinking of getting my sister to "make" some hemp french terry inserts. I see Greenbeans sells this by the metre & I'm guessing you'd get quite a few inserts from a metre of fabric.

So do you think you'd need an overlocker to sew along the edges of the insert?? Or would a basic sewing machine's zigzag stitch be sufficient? Anyone know how much this stuff is likely to fray?

Stacey this might be one for you (or anyone else who's made their own).

TIA.

Hemp french terry won't fray, it won't look so pretty, but does the job fine zigzagged/not even sewn.

Thanks Stacey, I thought that might be the case.