Firmness refers to how much “give” a pillow has when you put weight on it. The critical deciding factor is the individual’s sleeping position; a firmness that benefits a stomach sleeper may be uncomfortable for someone who sleeps on their back. Because of this, we recommend using two firm pillows and two softer or medium pillows as a standard of comfort ensuring a good night’s rest every time.
Synthetic (usually polyester) fill pillows are often a better fit for the hotel setting where lower cost and easier care are important. Their hypoallergenic properties make them suitable for use by all guests.
Natural fills are more “luxurious” from the softness of the feathers. However, these can wear down as time goes on, and are not hypoallergenic.