Product Features: Filling:50% Tencel, 50% Nano3D MaxWarm™ thermal Microfiber Covering: 100% thermal Microfiber Tencel® was developed by Austrian fabric company Lenzing that uses nano technology to turn fibre into a permeable, soft, anti-bacterial material. Tencel® is soft as silk, strong as polyester, cool as linen, warm as wool and more absorbent than cotton. Moisture and perspiration absorption; naturally anti-bacterial: Tencel® has an excellent moisture absorption rate, which is 50% higher than cotton. Tencel® can rapidly absorb or release water (sweat) based on climate change to provide a comfortable sleeping environment. It does not leave excess water on skin, which reduces breeding of bacterial. According to scientific research, Tencel® produced by nano technology minimises bacteria without adding any chemicals. Complies with various international safety standards: Made of 450g Nano3D MaxWarm™ thermal microfiber to effectively keep you warm and cozy; USA Thermal Resistance ASTM D1518 approved Air-permeable materials help accelerate blood circulation and relieve tiredness; Air Permeability BSEN ISO 9237 approved Soft fiber suitable for sensitive skin: Tencel® is softer than wool and cotton, giving a comfortable touch to skin; especially suitable for sensitive skin. EU Tex Standard 100 approved SGS approved Eco-friendly carriage bag