

Advantages
Cotton pillows are filled with 100% cotton. As a result, they often have a high firmness level, yet are capable of being somewhat soft. They hold their shape and loft / height reasonable well, resulting in at least average support throughout the night.
Because of their good firmness and reasonable loft / height, they are suited for back and side sleepers.
Cotton offers decent breathability and absorbency to help regulate a person's sleeping temperature. Cotton pillows are completely free of allergens, synthetics and chemicals. And they are easy to care for since they can be machine washed. They tend to be affordable, and typically do not cost more than USD 30.
Price Comparison
On Lazada (2 for $68)
On Redmart $26.90
On Amazon USD42.95