Not sure about "muslim" cloths!! But we went through several tonnes of muslins with dd, who was the most spectacularly vomity baby. I took her to a mums and babies group and after she threw up buckets one mum said to me - "goodness I thought my baby was sicky until I saw yours"!
So I never ventured more than 10 paces without at least 3 muslin squares.
You can put them in the cot / moses basket to save on sheets if you get a vomity child.
Also great when they start eating, tie them round their neck instead of a bib - far more coverage, plus they look entertaininly like a little gourmet.
PMSL!! I thought "well, maybe they're roomy and good at disguising a huge bump..."
Muslin cloths are fantastic though. You can make bibs out of the, emergency sun hats (complete with legionnaire flap), put them over the sheet in a moses basket so you simply move the cloth around if it get sicked on rather than cfaff around and change the sheet, over your shoulder to prevent sick/drool on your shoulder, you can make a comforter out of them (I made a great rabbit with one simply knot in a muslin!).... fantastic things.
Newborn nappies if you're using cloth. Less bulky and much cheaper.
I used them tucked over the moses basket sheets with dd as she was quite sicky and one night I ran out of sheets - I had loads of muslins and could then just change that, not the sheet. I was never more than 6 feet away from a muslin cloth for ages!
used mine as covers over the sheets to protect moses basket from possets, burping cloths, nappies. Not sure how big yours are - but I bought muslin wraps to swaddle dd in when she first came home from hospital asit was so hot here.
Muslin squares on the other hand- fantastic- had 3 or 4 on the go all the time. Very handy to wipe up any spills/ sick/dripping milk in bed.
If you leak from one boob (at night so maybe no bra????) while feeding then stick a muslin under the boob and it catches the milk. I always had 3 in bed with me to mop up sick etc. You can also put one as a 'draw' sheet under baby's head in the cot to save changing the sheet if he's ill. Also to put in the hv's scales to keep baby warm, also put on changing mat to keep baby warm... the uses go on and on and on... oh and now I use some as washing up cloths
thought i'd add to wash them before use. I got some for ds2 as was recommende. culdnt believe how hard they were, was so disapointed, used one anyway and washed it, onloaded washing and found a wonderful bit of cloth, wondered where it came from took a while for dh and I to put 2 and 2 together!!! Love them will be getting some more this time around.