Polyester Upholstery Thread 300 m - SLATE GRAY

Polyester Upholstery Thread in Slate Gray is an extremely strong and durable sewing thread designed for heavy-duty stitching and upholstery work.
Made from 100% polyester, this thread offers excellent abrasion resistance while remaining soft and flexible for neat, flat seams.
Ideal for sewing leather, vinyl-coated fabrics, denim, canvas, and carpet materials, this thread provides dependable seam strength where durability is essential.
The slate gray shade is a versatile neutral that works beautifully on modern upholstery fabrics and darker colour palettes.
With a practical 300 metre spool, this thread is well suited to upholstery projects, bag making, furniture repairs, and other heavy fabric applications.
Thread Weight Explained
This thread is 40wt, meaning it is thicker and stronger than standard all-purpose sewing thread.
A 40wt thread is ideal because:
- It provides strong seams for heavy fabrics
- It resists abrasion and wear
- It creates firm, secure stitching
- It remains flexible for flat, neat seams
- It is suitable for upholstery and repair work
Lower weight number = thicker thread
Higher weight number = finer thread
40wt is a popular choice for upholstery and heavy-duty sewing.
Product Details
Thread Type: Upholstery / heavy-duty thread
Colour: Slate Gray
Length: 300m
Thread Weight: 40wt
Material: 100% Polyester
Recommended Needle: Universal Needle NM 100 (US 16)
Recommended Use: Upholstery and heavy fabric sewing
Creative Uses
Upholstery and furniture repairs
Leather and vinyl sewing
Denim and canvas projects
Carpet edging and repairs
Bag and tote construction
Outdoor and utility sewing
Craft projects requiring strong seams