Why do sleeves bunch under a coat?
The underlayer may have more sleeve volume or friction than the coat accommodates. Narrow armholes, lining and cuff construction can also contribute.
A practical way to check
Try a smoother or thinner underlayer and compare with the original to identify the source of bunching.
What can lead you astray?
Pulling sleeves down repeatedly may mask a mismatch rather than resolve it.
Put the answer in context
Try the outer layer with the thickest realistic outfit you will wear underneath it. Check closure, arm movement, pockets and sitting comfort. A coat that looks good open may behave differently when fastened, and fabric composition alone does not establish weather protection.
Read the related guide for the broader decision. If you use a generated clothing preview, compare it with the original product photo and read what a preview can establish.
For a visual introduction to the product, visit the nista journal. When you want to try a supported clothing image, start with nista’s installation guide.
Frequently asked questions
Should I automatically size up for layering?
No. Compare the cut and garment measurements first. Some coats already include substantial layering room, while a larger size can change sleeve and shoulder placement.
Does a coat photo prove it is weatherproof?
No. Look for the manufacturer’s explicit performance description and care instructions. Appearance or fiber content alone does not establish protection.
What is a useful first step for this question?
Try a smoother or thinner underlayer and compare with the original to identify the source of bunching.