Bamboo underwear and how it behaves after many washes

Short answer: After thirty washes it is the elastic that has changed, not the fabric. The bamboo viscose itself gets softer, while the elastane slowly loses its stretch.

The fabric gets softer

The fibres become more flexible over time, and the brief feels softer than when it was new. That is an advantage and not wear, and it is why a well worn pair is often the one you reach for first. See bamboo briefs.

The elastane loses stretch

Elastane is broken down by heat, chlorine and time. That is why the waistband goes slack before the fabric wears through. See washing and care.

How to extend the period

40 degrees, no fabric softener and air drying or low heat. Those are the three moves that work. See bamboo underwear for women.

When it is over

If the waistband does not spring back when you pull and let go, the piece is finished. The measurements for a replacement are in guide to briefs and underwear.

Frequently asked questions

Does bamboo underwear get softer over time?

Yes. The fibres become more flexible, and the fabric feels softer after a number of washes.

What gives way first?

The elastane in the waistband. It is broken down by heat long before the fabric wears through.

How do I extend the life?

40 degrees, no fabric softener and air drying or low heat in the tumble dryer.