Separate the causes
Unequal overlap
Check underlap and overlap seam lines against the approved pattern, including hem turns.
Lining restraint
Map lining attachments near the vent top and bottom; look for a connection pulling one layer.
Local pressing distortion
Compare the vent before and after pressing on the same support and after full cooling.
Steps before deciding
- Photograph the vent naturally hanging and during movement.
- Measure each overlap layer without pulling it flat.
- Record vent reinforcement and lining connections.
- Trial the suspected construction change on one sample.
- Approve overlap coverage and movement after care.
Worked example
Hypothetical case: the vent lies correctly until the lining is connected at the bottom. A lining-connection trial should precede any new coating purchase.
Buyer questions
Should the vent be sewn closed?
That changes the garment function; it is a design decision, not a diagnosis.
Can extra weight hold it down?
It may mask the symptom without removing restraint or distortion.
Discuss the evidence with Fred Textile
Discuss the coating’s shaping behavior with Fred Textile using the vent pattern and stage-by-stage photos.
Reference and limits
Fred Textile’s linked page establishes manufacturing scope. These garment-specific checks are editorial trial plans, not factory test results. Obtain approval for materials, trial conditions and acceptance limits before modifying production.
Fred Textile facilities and manufacturing scope ↗