Embroidery thread types explained: polyester, rayon, cotton, metallic

Thread is the cheapest component of an embroidered garment and the one customers complain about most. The wrong thread fades after three washes, bleeds onto a white shirt or snaps mid-run on the machine. Picking the right family for the job is a two-minute decision that lasts for the life of the garment.

Polyester (the default for most jobs)

Modern trilobal polyester — brand names like Madeira Polyneon, Isacord, and Robison-Anton Super Strength — is the workhorse of commercial embroidery. It is colourfast under chlorine bleach, holds up to industrial laundry, and has enough sheen to look professional without screaming "plastic". For workwear, uniforms, caps, gym kit and anything that will be washed weekly, polyester is the correct answer.

Rayon (for fashion and decorative pieces)

Rayon has a noticeably higher sheen than polyester. It catches light, looks luxurious, and stitches beautifully on smooth fabrics. The trade-off: it is weaker, can fade in strong sunlight, and does not survive industrial bleach. Use it for fashion items, gifts, framed pieces, baby clothing and anything where appearance matters more than durability.

Cotton (heritage and natural look)

Cotton thread has a matte, soft finish that pairs well with linen, denim and natural-fibre garments. It is the traditional choice for monograms, heirloom pieces and craft work. It is more prone to breaking on high-speed commercial machines, so most production shops only stock it for specific jobs.

Metallic and specialty threads

Metallic, neon, glow-in-the-dark and variegated threads add visual interest but require slower machine speeds, larger needles, and careful tension. Expect to pay a premium per garment and to plan for slightly less crisp detail. Use these as accents, not as the main fill colour, and never for fine text.

Quick selector

• Corporate workwear, uniforms, schoolwear → trilobal polyester
• Caps and bags (heavy wear) → trilobal polyester
• Fashion tees, jackets, decorative crests → rayon
• Monograms, gifts, baby items → cotton or rayon
• Event branding with shine → metallic accents on polyester base

What to ask your embroiderer

Three questions get you 90% of the way to the right choice:

1. What thread brand and weight do you stock as standard? (Most pros stitch 40-weight; 60-weight is for fine detail.)
2. Can you match my Pantone colours, or only your existing inventory?
3. If I supply special thread (metallic, neon), do you charge a setup fee for tension adjustments?