Coats Seamsoft


A thread for exceptionally comfortable and soft seams

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Coats Seamsoft is a unique micro-filament textured polyester thread that offers exceptional softness and comfort, especially in “next-to-skin” seams.

It offers excellent seam covering properties and extensibility for knitted and stretch fabrics.

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Sewing thread activewear

Features and Benefits

  • Delivers exceptional softness in the seams combined with high productivity
  • High extensibility and seam strength give good seam security
  • Unique full range of four different constructions giving you the best choice for softness
  • Seamsoft 120 (Tex 16) and Seamsoft 140 (Tex 24) are particularly suitable for use in both needles and loopers, delivering the ultimate softness with one thread choice
  • Seamsoft 160 (Tex 18) and Seamsoft 80 (Tex 35) are constructed to maximise seam coverage whilst maintaining good sewability
  • Low shrinkage characteristics ensure no seam distortion after washing
  • High level of colour fastness even in demanding washing conditions
  • Certified to STANDARD 100 by OEKO-TEX® class I, the most stringent class covering textile items for babies and toddlers


The softness of a seam relates to a number of factors including the exact choice of thread in needle and spreader, fabric, sewn seam direction, stitch density and thread tension. Please refer to Soft and Secure Seams for further guidance.

Since conditions and applications vary considerably in the use of a product, the customer and/or user should assure herself or himself that the product meets end customer requirements and is suitable for the intended end use. Coats accepts no liability for unsuitable or improper use or application of products.

Information provided above is based on current averages and should be taken only as indicative. Coats accepts no liability for the preciseness and correctness of the information provided.

Product information sheets are updated from time to time, please be sure you are referring to the most recent publication. Coats supports customers with advice on individual applications on request; if you have any questions or concerns, please contact us.