The Hot Air Cotton Non-Woven ES Filter discloses warm-keeping cotton. The warm-keeping cotton comprises fiber mixed cotton and melt-blown non-woven fabric layers, wherein the melt-blown non-woven fabric layers are coated on front and back surfaces of the fiber mixed cotton; the melt-blown non-woven fabric layers are made of PP (Propene Polymer) non-woven fabric with gram weight of 8-12g/m<2>; the fiber mixed cotton is non-woven hot air cotton; the non-woven hot air cotton is a fiber fabric which is formed by mixing PP fiber and PET (Polyethylene Terephthalate) short fiber; and the integral thickness of the warm-keeping cotton is 5-50mm, and the integral gram weight of the warm-keeping cotton is 50-500g/m<2>.

Compared with existing warm-keeping cotton that eiderdown is arranged between two cloth interlayers, the warm-keeping cotton has a simple production process, also has the advantages of being light, warm, fine and free of peculiar smell, and is not bloated after being made to clothes. Moreover, the warm-keeping cotton has greatly improved warm-keeping efficiency, and can be widely applied
for making clothes, quilts, pillows and special outdoor
clothes.