Innovative sleeping pillow made from Kapok fibers. The side zipper allows you to adjust the amount of kapok fibers inside, for complete volume control. Kapok fibers consist of 80% air that acts as an insulator, while offering optimal air circulation which is ideal for those who tend to sweat or freeze at night. It is also hypoallergenic, as bacteria and dust mites cannot grow and survive in its fibers while it is resistant to water and moisture. Kapok consists of very thin, self-cleaning, hollow fibers, which have a long life.