The Harmony has a 60% plant-based fiber filler with 40% being mulberry silk. Durable and wear-resistant ceiba plant-based fiber is ultra elastic retaining its original form easily and quickly An eco-friendly fiber, hand collected with no chemicals used when processed Natural Mulberry silk with antibacterial properties and several health benefits The silk amino acids that aid in stress reduction Mulberry fibers retain heat and maintain consistent temperatures regardless of weather Perfect for year-round use 100% cotton cover with a 300 TC density in a jacquard weave Hand collected long cotton fibers maintain the strength, form and look through regular washing and use over several years Composition: 60% kapok 40% silk 1100g Composition case: 100% cotton Cover fabric: jacquard 300 TC Degree of elasticity: Soft Preferred sleeping position: Stomach Sleeper, Back Sleeper Do not wash, do not bleach, do not iron, dry clean, do not tumble dry