Size:King 20"x 36" Silk covered silk filled pillow is dense and firm which provides the optimal level of support for the neck. Filled with 100% silk floss with silk casing, the pillow remains cooler throughout the night, resulting in a more comfortable and restful sleep. Filling: 100% natural "A" grade long strand mulberry silk Casing: 400 thread count 19mm Mulberry silk Certification: Certified to internationally-recognised Oeko-Tex Standard 100 Care: Rarely requires cleaning. Simply air outside on a sunny day to freshen up Dry clean only The 100% silk filled pillow is the finest and perfect solution for the ultimate night's sleep. Silk is hypo-allergenic so is great for allergy sufferers, and may also beneficial to those who suffer aches and pains, itchy skin such as rosacea and eczema. This luxury silk pillow will keep your head at a constant temperature throughout the night as silk is a breathable fibre and prevents perspiration.