If they were polyester fleece PJs, yes.
If you're trying to cut a long straight line to do a row of liners (and then cut it up to the right length), a good tip to getting a straight line is very sharp scissors and don't look at the bit you're actually cutting, look ahead of the scissors to the end of the fabric where you want to end up. Or, you could fold or loosely roll the fabric and cut the strip so you'd only be cutting the length of one liner and you'd do the lot at once!
Pfft you should see mine! they are all wonky
Probably not best to mark them out with perma-marker like I did and didnt wash them first, and Fi had black pen lines all over her bum ..mean mummy...