monitor (provided for in subheading 6109.90.10) Free No change No change On or before 12/31/2020 . 1228. Women's or girls' man-made fiber knit vests Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.13.46 Women's or girls' knitted or crocheted vests of man-made fibers, containing 23 percent or more by weight of wool, each with fabric stitch count greater than 9/2 cm, measured in the direction the stitches are formed (provided for in subheading 6110.30.15) Free No change No change On or before 12/31/2020 . 1229. Vests incorporating a heart rate monitor Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.13.47 Vests (other than sweater vests) for men, knitted or crocheted, of man-made fibers, with textile or polymer-based electrodes knitted into or attached to the fabric and incorporating two snaps designed to secure a module to transmit heart rate information from the electrodes to a compatible monitor (provided for subheadings 6110.30.30) Free No change No change On or before 12/31/2020 . 1230. Men's or boys' silk knit pullovers and cardigans Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.13.48 Men's or boys' knitted or crocheted pullovers and cardigans, containing 70 percent or more by weight of silk, each with more than 9 stitches/2 cm, measured in the direction the stitches were formed, and an average of less than 10 stitches/linear cm in each direction counted on an area measuring at least 10 cm by 10 cm, such apparel articles that reach the waist (provided for in subheading 6110.90.10) Free No change No change On or before 12/31/2020 . 1231. Men's or boys' linen knit sweaters Subchapter II of chapter 99 is amended by inserting in numerical sequence the following new heading: 9902.13.49 Men's or boys' knitted or crocheted sweaters of linen, each with 9 or fewer stitches per 2 centimeters measured in the direction the stitches were formed