Japanese selvedge denim has a strong following for its texture, depth of color, and the way it fades with wear. It is also more expensive than most jeans and needs a little more thought about sizing and care. This guide explains the terms, what affects the look and feel, and how to choose a pair you will enjoy wearing in.
Raw vs selvedge
These terms are often confused:
- Raw denim has not been washed after dyeing. It starts stiff and dark, and fades based on how you wear it.
- Selvedge denim is woven on narrow shuttle looms that produce a clean, self-finished edge (the "self edge"). You can see it on the outseam when you roll the cuff, often with a colored line.
Jeans can be raw and selvedge, raw but not selvedge, or selvedge but pre-washed.
Shuttle looms and texture
Shuttle looms weave more slowly and at lower tension than modern projectile looms. Combined with yarn choices, this can produce a slightly uneven texture called slub, which many people like for its character. Not all selvedge denim is slubby; some is smooth and clean.
Rope dyeing and fading
Many denim mills dye yarn using rope dyeing, where bundles of yarn are dipped repeatedly in indigo. The indigo often stays mostly on the outer part of the yarn, leaving a lighter core. As the surface wears, the lighter core shows, creating high-contrast fades at the knees, thighs ("whiskers"), and behind the knees ("honeycombs").
How a pair fades depends on the fabric, how often you wear it, and your activities.
Fabric weight
Denim weight is measured in ounces per square yard.
- 12 to 14 oz: comfortable year-round and easier to break in.
- 15 to 18 oz: heavier, warmer, and slower to break in.
- Above 18 oz: very heavy; mostly for enthusiasts.
Heavier denim is not automatically better. Choose based on climate and comfort.
Sanforized vs unsanforized
- Sanforized fabric has been pre-shrunk at the mill and typically shrinks only a little after washing.
- Unsanforized ("loomstate") fabric can shrink significantly, often several percent in length and waist.
Check the maker's shrinkage guidance and size charts. With unsanforized denim, many people soak the jeans before wearing or size up.
Fit and sizing
- Measure a pair of jeans you already like (waist, rise, thigh, knee, leg opening, inseam).
- Compare with the maker's measurements, noting whether they are pre- or post-soak.
- Expect raw denim to stretch slightly in the waist with wear.
First wash and care
There is no single right approach. Common advice:
- Wear for several weeks or months before the first wash to set fades, if you want strong contrast.
- Wash inside out in cold water with mild detergent.
- Hang to dry.
- Wash more often if the jeans get dirty or smell; hygiene matters more than fades.
Expect indigo to rub off onto light fabrics and furniture when new.
Quick checklist
- Decide whether you want raw, pre-washed, selvedge, or a combination.
- Choose a weight for your climate.
- Check sanforized vs unsanforized and shrinkage.
- Compare measurements with jeans you own.
- Plan for indigo transfer early on.
- Read the return policy, since raw denim often cannot be returned after soaking.
FAQ
Is selvedge denim more durable? Not necessarily. Durability depends on yarn, weave, and construction. Selvedge mainly indicates the loom type and edge finish.
Do I have to avoid washing raw denim? No. Washing less often helps keep contrast, but wash whenever you need to.
Why is Japanese denim expensive? Slower looms, smaller production runs, and detailed dyeing and finishing increase cost.
