Selvedge denim
Denim woven on traditional shuttle looms, producing a clean self-finished edge that doesn't fray. Slower to make, more expensive, often higher quality.
Selvedge (sometimes "selvage") denim is woven on narrow shuttle looms — typically 28–32 inches wide — that produce a clean, self-finished edge running down the length of the fabric. The phrase is a contraction of "self-edge." Most modern denim is woven on faster, cheaper projectile looms that produce wider fabric (60+ inches) with raw edges that need overlocking.
Why the distinction matters: shuttle looms run slowly, which produces a denser, more irregular weave. The fabric has more character — slubs, color variation, more interesting fade patterns over time. Selvedge fabric is also disproportionately woven by Japanese mills (Kaihara, Nihon Menpu, Kuroki) using vintage American Cone Mills loom technology, with stricter quality control than mass-market Chinese or Mexican mills. So "selvedge" became a proxy for "denim from a craft mill."
But: selvedge is a manufacturing method, not a quality guarantee. Cheap selvedge from any mill exists. The fabric is the thing — Japanese shuttle-loom denim from Kaihara at 14oz is very different from a brand that sources cheap selvedge to claim the label. Price is usually the tell: real Japanese selvedge starts around $200 retail per pair.
Oz (fabric weight)
Ounces per square yard — the imperial unit for fabric weight, used most often for denim, canvas, and other heavy fabrics.
Raw denim
Denim that has not been pre-washed or pre-faded. Starts stiff, dark, and uniform; develops fade patterns specific to the wearer over months of break-in.
Sanforized
A pre-shrinking treatment for cotton fabric. Sanforized denim shrinks ~1% on first wash; unsanforized shrinks 5–10%.
Japanese mills (denim, fabric)
Japan's textile industry produces some of the world's highest-quality denim, fabric, and dyeing — concentrated in Okayama and Hiroshima.