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HS heading 55.09: Yarn (other than sewing thread) of synthetic staple fibres, not put up for retail sale

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Key facts

Heading
55.09
Description
Yarn (other than sewing thread) of synthetic staple fibres, not put up for retail sale
Chapter
55: Man-made staple fibres
Subheadings
18
Edition
HS2022

Summary

HS heading 55.09 covers yarn (other than sewing thread) of synthetic staple fibres, not put up for retail sale. It is in chapter 55 (man-made staple fibres). It is split into 18 subheadings: 5509.11 (containing 85 % or more by weight of staple fibres of nylon or other polyamides, single yarn), 5509.12 (containing 85 % or more by weight of staple fibres of nylon or other polyamides, multiple (folded) or cabled yarn), 5509.21 (containing 85 % or more by weight of polyester staple fibres, single yarn), 5509.22 (containing 85 % or more by weight of polyester staple fibres, multiple (folded) or cabled yarn), 5509.31 (containing 85 % or more by weight of acrylic or modacrylic staple fibres, single yarn), 5509.32 (containing 85 % or more by weight of acrylic or modacrylic staple fibres, multiple (folded) or cabled yarn) and 12 others. National tariff lines under heading 55.09 are live on border.bot for the United States (27 lines, also used by 1 other country).

What this code covers

HS heading 55.09 covers yarn (other than sewing thread) of synthetic staple fibres, not put up for retail sale.

It is split into 18 subheadings: 5509.11 (containing 85 % or more by weight of staple fibres of nylon or other polyamides, single yarn), 5509.12 (containing 85 % or more by weight of staple fibres of nylon or other polyamides, multiple (folded) or cabled yarn), 5509.21 (containing 85 % or more by weight of polyester staple fibres, single yarn), 5509.22 (containing 85 % or more by weight of polyester staple fibres, multiple (folded) or cabled yarn), 5509.31 (containing 85 % or more by weight of acrylic or modacrylic staple fibres, single yarn), 5509.32 (containing 85 % or more by weight of acrylic or modacrylic staple fibres, multiple (folded) or cabled yarn) and 12 others.

  • 5509.11Containing 85 % or more by weight of staple fibres of nylon or other polyamides: Single yarn
  • 5509.12Containing 85 % or more by weight of staple fibres of nylon or other polyamides: Multiple (folded) or cabled yarn
  • 5509.21Containing 85 % or more by weight of polyester staple fibres: Single yarn
  • 5509.22Containing 85 % or more by weight of polyester staple fibres: Multiple (folded) or cabled yarn
  • 5509.31Containing 85 % or more by weight of acrylic or modacrylic staple fibres: Single yarn
  • 5509.32Containing 85 % or more by weight of acrylic or modacrylic staple fibres: Multiple (folded) or cabled yarn
  • 5509.41Other yarn, containing 85 % or more by weight of synthetic staple fibres: Single yarn
  • 5509.42Other yarn, containing 85 % or more by weight of synthetic staple fibres: Multiple (folded) or cabled yarn
  • 5509.51Other yarn, of polyester staple fibres: Mixed mainly or solely with artificial staple fibres
  • 5509.52Other yarn, of polyester staple fibres: Mixed mainly or solely with wool or fine animal hair
  • 5509.53Other yarn, of polyester staple fibres: Mixed mainly or solely with cotton
  • 5509.59Other yarn, of polyester staple fibres: Other
  • 5509.61Other yarn, of acrylic or modacrylic staple fibres: Mixed mainly or solely with wool or fine animal hair
  • 5509.62Other yarn, of acrylic or modacrylic staple fibres: Mixed mainly or solely with cotton
  • 5509.69Other yarn, of acrylic or modacrylic staple fibres: Other
  • 5509.91Other yarn: Mixed mainly or solely with wool or fine animal hair
  • 5509.92Other yarn: Mixed mainly or solely with cotton
  • 5509.99Other yarn: Other

What it doesn’t cover

Other goods of chapter 55 are classified in its other 15 headings, listed below.

  • 55.01Synthetic filament tow
  • 55.02Artificial filament tow
  • 55.03Synthetic staple fibres, not carded, combed or otherwise processed for spinning
  • 55.04Artificial staple fibres, not carded, combed or otherwise processed for spinning
  • 55.05Waste (including noils, yarn waste and garnetted stock) of man- made fibres
  • 55.06Synthetic staple fibres, carded, combed or otherwise processed for spinning
  • 55.07Artificial staple fibres, carded, combed or otherwise processed for spinning
  • 55.08Sewing thread of man-made staple fibres, whether or not put up for retail sale
  • 55.10Yarn (other than sewing thread) of artificial staple fibres, not put up for retail sale
  • 55.11Yarn (other than sewing thread) of man-made staple fibres, put up for retail sale
  • 55.12Woven fabrics of synthetic staple fibres, containing 85 % or more by weight of synthetic staple fibres
  • 55.13Woven fabrics of synthetic staple fibres, containing less than 85 % by weight of such fibres, mixed mainly or solely with cotton, of a weight not exceeding 170 g/m2
  • 55.14Woven fabrics of synthetic staple fibres, containing less than 85 % by weight of such fibres, mixed mainly or solely with cotton, of a weight exceeding 170 g/m2
  • 55.15Other woven fabrics of synthetic staple fibres
  • 55.16Woven fabrics of artificial staple fibres

How it is structured

Heading 55.09 is one of 16 headings in chapter 55. Its first two digits, 55, are the chapter; the next two, 09, number the heading within it. Its subheadings add two more digits (5509.11, 5509.12, 5509.21).

In other countries

National tariff lines under heading 55.09 are live on border.bot for the United States (27 lines, also used by 1 other country).

Frequently asked questions

What does HS heading 55.09 cover?

HS heading 55.09 covers yarn (other than sewing thread) of synthetic staple fibres, not put up for retail sale.

Which chapter is HS heading 55.09 in?

HS heading 55.09 is in chapter 55 (man-made staple fibres).

How many subheadings does HS heading 55.09 have?

HS heading 55.09 has 18 subheadings: 5509.11 (containing 85 % or more by weight of staple fibres of nylon or other polyamides, single yarn), 5509.12 (containing 85 % or more by weight of staple fibres of nylon or other polyamides, multiple (folded) or cabled yarn), 5509.21 (containing 85 % or more by weight of polyester staple fibres, single yarn), 5509.22 (containing 85 % or more by weight of polyester staple fibres, multiple (folded) or cabled yarn), 5509.31 (containing 85 % or more by weight of acrylic or modacrylic staple fibres, single yarn), 5509.32 (containing 85 % or more by weight of acrylic or modacrylic staple fibres, multiple (folded) or cabled yarn) and 12 others.

Which countries’ tariffs list national lines under HS heading 55.09?

National tariff lines under heading 55.09 are live on border.bot for the United States (27 lines, also used by 1 other country).

Sources and updates

The Harmonized System legal text comes from border.bot release 2 (edition HS 2022), imported from a file, and has been live since 11 October 2026.

This page was last updated on 11 October 2026.

Guidance from published tariff data, not a binding ruling. For a decision customs must follow, apply to the destination’s customs authority for a binding tariff ruling.

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