Kiin fitted sheets are made from the softest organic cotton + bamboo blend. They are soft and gentle against delicate skin, laying smoothly beneath your little one; even through tosses and turns. Kiin fitted sheets are breathable & ideal for all seasons and temperatures. Our bamboo & organic cotton fabric blend not only feels luxuriously soft but has so many benefits! Bamboo has antibacterial and hypoallergenic qualities, it is more absorbent & breathable, and one of the most eco-friendly fabrics on the planet! Bamboo is extremely environmentally friendly - using very little water to grow, is a self-replenishing resource, needing no harmful pesticides and being 100% biodegradable. There is no other plant used in fabrics that is as well-suited and gentle on planet Earth.