Over 35 years of sleep science is behind the Acorn Organic Crib Mattress to ensure you`re putting only the best in your baby`s crib. This mattress combines everything Land and Sky has learned about healthy sleep and natural and organic ingredients.10 0% Organic Cotton Quilted CoverThis silky-soft 100% organic cotton ticking is unbleached and is free of harsh chemicals and synthetic fibers providing a healthy cover for your baby. This sumptous cover creates a naturally hygienic sleep surface.Orga nic Pure Wool Fill: The Acorn`s pure wool top layer adds moisture and temperature control. You can`t get this feature with any synthetic fill. Pure wool naturally absorbs 30% of its own weight in moisture to keep your baby dry and comfortable all nig ht. Wool is a complex and breathable fiber and its dry porous nature keeps mildew and dust mites out. It is naturally resistant to fire as well. Naturally resilient pure wool works like a coiled spring creating a high loft in the mattress and maintai ning its shape during use.Fire Barrier: The Acorn Organic Crib Mattress meets and exceeds the new California Fire Retardant standards which are the strictest in the nation. The Acorn does this naturally and chemical-free with its layer of 100% pure w ool.About Land and SkyThe people at Land and Sky believe in improving the quality of sleep thereby improving the quality of life. For over 37 years Land and Sky has been innovating the quality of sleep products resulting in over 40 patents. Land and Sky has been recognized around the world as a leader in the industry and a leader in the technology of sleep. Their hard work results in a sleep system that combines therapeutic benefits and unparalleled comfort