Thom Browne Multicolor Hoodie and Pullover Collection in Yarn-Dyed Cotton, S–XXL

Chinese buyer who owned an authentic Thom Browne navy sweatshirt and compared it side by side with a friend's replica reported the two looked nearly identical at first (he needed the zipper engraving to tell them apart), but over time the sleeve 4-bar stripes became the giveaway: the authentic yarn mesh/texture is slightly coarser while replicas are uniformly flat.

Authenticity/QC guide relevant to the 4-bar stripe construction on cotton sweat/hoodie styles: replica 4-bar stripes are typically printed with thick, glossy plastisol rubber that sits on top of the fabric, covers the knit pores, feels raised to the touch and often fails to line up across the side seam, whereas the authentic stripes are knit/dyed into the fabric with even spacing and thickness — usable as a QC checklist when inspecting photos of this kind of hoodie.

Line-level evidence (authentic cotton 4-Bar hoodie, not this seller's rep): Mytheresa's product page for the navy cotton 4-Bar hoodie (100% cotton, adjustable drawstring hood, zip front, welt pockets) states it runs small and recommends sizing one up, with a close fit across the shoulders. No buyer or QC discussion was found for this specific Weidian listing's S–XXL sizing, so reps of this model may scale differently.

Line-level evidence from an authorized retailer's own size note on the classic loopback cotton full-zip 4-Bar hoodie: the style is cut smaller than usual and shoppers are told to go two sizes up from the size chart — notably stricter than other retailers' 'one size up' guidance for the same hoodie family, so fit advice for TB 4-Bar hoodies is inconsistent.

Line-level evidence for the grey loopback-cotton 4-Bar full-zip hoodie: retailers describe it as a slim cut and advise broader-framed wearers to take a size up, i.e. toward a looser fit rather than the standard trim TB silhouette.

Chinese-language buyer forum advice on Thom Browne hoodies: the brand's cut usually runs small, so shoppers are told to compare actual chest measurements in centimetres from the product page instead of trusting the size label, buying their normal size for a loose look and going slightly smaller for a fitted look.

Chinese buyer discussion about Thom Browne knitwear and sweats: owners note authentic pieces carry a clean yarn smell (explicitly not perfume) that some use as a quick legit check, and note authentic workmanship is only upper-mid grade with occasional loose threads — relevant when judging whether a rep smells of chemicals or of nothing.