WHAT CAUSES A CREW NECK T-SHIRT COLLAR TO STRETCH OUT OR SAG?
Crew neck collar sagging is caused by lack of elastane in the collar ribbing, low-density single-knit rib construction, and excessive heat exposure during washing. To ensure long-lasting shape retention, manufacturers blend 3% to 5% Lycra spandex into the cotton ribbing and secure the neckline using double-needle coverstitching with interior herringbone neck tape.
