NOFFA Thin Pillow for Adults, 2.4” Slim Memory Foam Pillow Flat for Sleeping, Low Profile for Kids/Stomach Sleeper, Standard with Washable Cover( 1 ) All memory foam products will become softer as the temperature rises and firmer as the temperature decreases. It is recommend to use it in a place with heating in winter. ( 2 ) SMALL NOTES 1: IT IS THIN, DESIGN FOR kids AND PEOPLE SLEEPING LOW CUSHIONS. Flat pillows Perfect for belly sleeper and back sleeper. ( 3 ) SMALL NOTES 2: IT IS THIN, We recommend this pillow as an extra pillow on your pillow. Thin pillows ideal as a neck pillow, small