It is this special absorbent fabric, but it doesn't feel plasticy next to my skin, so i'm assuming not. I never wake up feel hot and sticky (well, sticky from breastmilk, but that's inevitable), like you do from some artificial fabrics.

I had really really severe thrush before i got these, and have never had it since.. Not saying it can't happen, just that mine never came back, so i would assume it is not a problem.

Seriously i love these products! One of the best things i ever got, i actually get a comfortable nights sleep, unlike before! And i don't have to wash heaps of bed sheets. But i recommend getting at least 2, as i find i wash them every night or every second night (the lycra ones dry super quick, the cotton a little longer, but the cotton is better as the top is longer).

Reason i wash so much is they end up absorbing heaps of milk over the night, and 1) they will smell i assume if you leave it to long and 2) the end up absorbing less if you leave it longer between washes, and then you end up slightly damp (not soaking like you normally would, but damp none the less).

HTH guys!