Filling: silk wool
 The lining material is made of 240 T polyester pongee, skin-friendly and comfortable 
 Fabric-20D 380 T ultra-light Nylon 
 Made of ultra-light 20D 380 T nylon fabric, high density, effective waterproof, it is also very reliable for outdoor use. 
 Double sided splicing design 
 Two single sleeping bags can be combined into a double sleeping bag, more space, more warmth.