I agree with that statement, but with one qualifier: all truly high-end shirts will have single-needle tailoring, but not all shirts billed as "high-end" do.Buddy, ALL high-end shirts feature single-needle stitching.
I just double-checked and I have a Harry Rosen Satoria shirt in my closet which has double-needle lock stitched tailoring. I distinctly remember the disappointment with that when it arrived and I examined the finished product for the first time. That's going back awhile, so perhaps they've rectified that situation now.
Holt Renfrew's MTM program through Coppely also uses double-needle lock-stitched tailoring. I've seen the samples myself and the manager of their menswear department confirmed that for me.
So I guess your statement depends on how you define a "high-end" shirt.
Last edited: