Cover: Luxuriously soft terry cotton cover lined with a plush layer of Natura Smart Wool™. The zip-off cover is completely removable for easy care.Lining: The Natura Smart Wool™ lining creates an insulating layer that helps to regulate temperature next to the skin throughout the night, allowing you to achieve longer periods of deep sleep. Natura Smart Wool™ also wicks away excess moisture, creating a fresh, dry sleep environment that repels common allergens and bacteria that thrive in moist surroundings. Core: Made with a 100% Talalay latex, the Ultimate Pillow core provides resilient support that wont clump or pack down. It adjusts to the contours of the head and neck, keeping the spine correctly aligned to provide tension-free comfort throughout the night. Naturally breathable and hypoallergenic, the Talalay latex core is also antimicrobial, inhibiting the presence of allergens such as mold, mildew and dust mites.