Question: what fabric is the most absorbent?
Answer: Cotton – This is easy to find, and inexpensive – which makes it a popular choice. ... 
Flannel/Flannelette – This is a really thin fabric – what you find fluffy sheets or PJs made of. ... 
Cotton Terry – This term is usually used to refer to the cotton “towelling' (like you would find towels and wash cloths made from).