The gusset in briefs and what it is for

Short answer: The gusset is the extra layer of fabric in the crotch. It is there for hygiene and is best made of pure cotton or pure viscose with no elastane.

Why there is an extra layer

The crotch is where the fabric is most damp. An extra layer draws the moisture away from the skin and gives a softer surface that does not chafe. It is standard in almost all briefs.

What the material means

Elastane in the gusset does not handle moisture the way pure viscose or cotton does. Most makers therefore use a different fabric in the gusset than in the rest. See bamboo briefs for women.

How to check your own

Turn the briefs over and see whether the gusset is sewn in as a separate piece. If the label states a different fibre composition, it is. See bamboo underwear for women and period underwear.

Frequently asked questions

Is the gusset stitched down at both ends

Often only at one, so it can lie flat. That is not a fault.

Can the gusset be washed differently

No, the whole garment is washed together at 40 degrees.

What if the gusset discolours

That is normal over time. It is not a sign of poor quality.