Fiber filling nonwoven

A fiber filling nonwoven, consisting essentially of:

• at least one fiber web;
• and
• a plurality of first fiber balls, wherein parts of the plurality of first fiber balls are directly fixed on the at least one fiber web, and another parts of the plurality of first fiber balls are indirectly fixed on the at least one fiber web through being fixed on the parts of the plurality of first fiber balls,
• wherein each of the plurality of first fiber balls comprises a plurality of first polyester hollow fibers and a plurality of second polyester hollow fibers,
• the plurality of first polyester hollow fibers and the plurality of second polyester hollow fibers are inelastic hollow polyester fibers with an elastic elongation rate equal to less than 50%,
• wherein the plurality of first polyester hollow fibers have a first crimp number, and the plurality of second polyester hollow fibers have a second crimp number which is different from the first crimp number,
• a difference of the first crimp number and the second crimp number is in a range from 4 to 10, and
• a compression resilience ratio of the fiber filling nonwoven is equal to or greater than 80%.