How core-spun and spun polyester sewing threads differ in strength, seam appearance and cost for tees, hoodies and underwear, and how to specify thread and check seams.
How silicone leg grippers keep compression and cycling shorts in place, the comfort and durability trade-offs, alternatives such as wide bands, and what to specify and test.
Why jersey tees often shrink in length and grow in width after washing, how fabric finishing and compaction affect it, and how to set separate length and width tolerances.
How FTC guidance treats Pima, Egyptian and other premium cotton names on tee labels and hang tags, when the percentage must appear, and what hang tags need to disclose.
How the FTC 3% tolerance for fibre content works on US textile labels, why “100%” claims have no tolerance, and what to do when a lab result differs from your label.
How FTC Textile Rules treat waistbands, leg bands and elastic in briefs and trunks, when “exclusive of elastic” applies, and when sectional fibre disclosure is needed.
How tubular and open-width finished jersey differ for tees, why side-seamed tees use open-width fabric, and how each affects sizing, shrinkage control, twist and cost.
How metal grommets and embroidered eyelets for hoodie drawcords compare on look, durability and washing, how to reinforce them, and what to specify and check in bulk.
Why leg hems on trunks and boxer briefs curl and flip up, how fabric, hem construction and pattern affect it, and which options to sample and specify for the reorder.
When packaged tees and undershirts need fibre, origin and identity details on the package as well as each garment, and how transparent packs and mail order differ.
Why many leggings use a crotch gusset, how diamond and triangle gussets differ, what fabric and seams to use, and how to check fit, opacity and seam strength in samples.
How to assess knitwear lab dips: viewing under agreed light sources, checking metamerism, comparing on the right fabric, recording the approval and controlling bulk shade.
