Twill Tape
Fabric — one of 56 in the glossary
A narrow woven tape, usually in a herringbone or plain twill, used inside garments to reinforce points that take tension — the back neck, the shoulders, pocket openings — and to bind raw edges. The twill weave is what makes it suitable: it is strong along its length, barely stretches, and lies flat enough not to show as a ridge through the outer fabric.
Strong, flat and non-stretching
Reinforcement tape has to resist being pulled longer while staying thin enough to disappear inside a seam. A twill weave does both: the diagonal interlacing is strong along the length and the tape lies flat.
Cotton and polyester twill tapes are both common; polyester holds up better to repeated laundering, cotton is softer against the skin.
Herringbone is the familiar pattern, which is why the tape inside a shirt collar so often shows a visible chevron.
Where it does its work
The back neck and shoulders of knits, which is the shoulder-to-shoulder taping on a spec sheet.
Pocket openings and other places a hand repeatedly pulls, where the tape stops the fabric tearing at a corner.
Binding raw edges inside plackets, armholes and hems, which is finishing rather than reinforcement.
As a visible detail
Some brands use contrast twill tape deliberately — a coloured chevron inside a placket or across the back neck — as a quiet design signature.
It is also the usual carrier for a printed inside-neck label, replacing a sewn-in tag.
Where it is visible, it reads as considered construction, which is much of why brands started showing it.
Common questions
- What is twill tape used for?
- Reinforcing points that take tension inside a garment — the back neck, shoulders and pocket openings — and binding raw edges. It is strong lengthwise, does not stretch and lies flat.
- Why is reinforcement tape usually twill?
- Because a twill weave is strong along its length, resists stretching, and is thin and flat enough not to show as a ridge through the outer fabric.
- Is the coloured tape inside a collar decorative?
- Both. It is doing real reinforcement work, and some brands use a contrast colour deliberately as a construction signature or as a printed label carrier.
See also
Last reviewed