Answer

Replica Gucci bags use four material groups: coated canvas, trim leather or synthetic, plated metal hardware, and a fabric lining. Coated canvas is a cotton or polyester base with a PVC or polyurethane top layer. Trim is polyurethane (PU), bonded leather, split grain, or full grain. Hardware is zinc alloy with brass or gold-tone plating. Full grain leather appears on a small share of replica Gucci bags and adds the most cost.

Coated canvas

Gucci GG Supreme is a coated cotton canvas. Replica canvas swaps in a polyester base in most cases. Polyester costs less than cotton, creases on folds, and shows a plastic sheen under direct light. Cotton base canvas folds soft and holds a matte surface. A 30 cm square of cotton base canvas carries more weight than the same square in polyester.

Checks

  • Rub test: a white cloth on a PU coated print picks up color. Stable coating stays put.
  • Fold test: 10 tight folds along one line. Cotton base shows soft creases. Polyester base shows white stress marks.
  • Corner cut: a seller who allows a corner cut shows the layer stack. Two layers means canvas plus coating. Three layers means a backing film.

Leather and synthetic trim

Four grades show up in the replica trade:

  • PU leather: plastic sheet on knit backing. No animal content. Splits at stress points in 6 to 12 months of daily use.
  • Bonded leather: shredded leather fiber with binder. Common grades hold 20 to 30 percent leather content.
  • Split grain with finish: the lower layer of a hide, sanded and stamped. Real leather, with weaker fiber structure than top grain.
  • Full grain: the outer hide surface. Grain pattern is unique per panel. Rare in replica production because of cost.

Hardware

Zinc alloy die casting is standard. Plating runs 0.3 to 3 microns. Brass plating at 2 microns and above resists wear on strap rings. Thin plating on zipper pulls turns dull and shows base metal at contact points.

Lining

Microfiber suede, polyester twill, and cotton drill are the three options. Microfiber suede has a brushed hand and low friction. Polyester twill costs less and pills at seams.

Legal note

Gucci is a registered trademark. US law bars the sale of counterfeit goods under 18 U.S.C. 2320 and 15 U.S.C. 1114. Customs and Border Protection seizes counterfeit handbags at entry. Material claims in a product listing can also fall under FTC labeling rules for leather and textiles.