Our 3″ made in the USA Wool Topper is covered in Certified Organic Cotton with Elastic Straps. Wool is a natural temperature regulator with the ability to wick away moisture from your body while you are sound asleep. Wool is a wonderful insulator, keeping you cool in the summer and warm in the winter without overheating. Another great property of wool is that it is naturally resistant to fire, mold, mildew, and dust mites which is great for our clients with allergies. Thanks to these amazing natural qualities, we believe this topper is far superior to any synthetic fiber. This wool topper adds comfort and a pillow-top feel to any mattress but combines works great with our all natural latex mattresses.