Why Your Shirt Collar Won't Stay Down (and How to Fix It)

A collar that won't behave is one of the most common complaints we hear, and almost always one of the easiest to solve — once you know which of three things is actually causing it.

1. The interlining has broken down

Underneath the visible fabric, every collar has a layer of interlining — stiff canvas or fused interfacing that gives it structure. Cheaper shirts use a fused interlining, glued rather than stitched in, and repeated washing and ironing breaks that glue bond down over time. Once it does, no amount of ironing will bring the shape back, because the structure holding the shape is gone. This is the one fix that isn't a fix — it means the collar needs replacing, or the shirt does.

2. It's being ironed the wrong way round

Most people iron a collar face up, flat, the same way they iron the rest of the shirt. That presses the top fabric smooth but does very little to reset the interlining underneath. Iron it from the underside instead, working from the points inward, while the collar is still slightly damp. The heat and damp together reshape the canvas layer, not just the surface — which is the difference between a collar that looks pressed for an hour and one that holds all day.

3. It's being starched — or not starched — inconsistently

Starch isn't required for a collar to hold its shape, but it isn't the enemy either. The problem is usually inconsistency: a heavily starched collar one week and a bare one the next stresses the interlining differently each time, and it's that back-and-forth that speeds up wilting. If you like the look of a starched collar, use a light spray starch every time you iron; if you don't, skip it every time. Either is fine. Switching is what causes trouble.

A quick way to tell which one you're dealing with

• Collar curls at the points only → usually an ironing issue, fixable
• Collar sits limp across the whole width → usually the interlining has broken down
• One side sits higher than the other → often the collar was never quite square when it was cut, or it's been ironed on one side more than the other

If you're buying new, the fix that matters most happens before the shirt ever reaches you: a stitched, three-layer canvas interlining, rather than a fused one, is what keeps a collar from wilting in the first place. It's slower to make and can't be done by machine alone, which is why it's worth asking about before you buy, not after.