Softening fabric and what happens in the process

Short answer: Short answer: Fabric is softened mechanically by washing and tumbling it, or chemically with a softening agent. The first stays put, the second washes back out again.

How mechanical softening works

The fabric is washed, tumbled and physically processed through several steps in production, loosening the fibers from each other and from the stiffness they have right after weaving or knitting. That softness stays, because it sits in the structure of the fabric itself rather than in a layer that can later wear or wash off.

How chemical softening works

Some manufacturers add a softening agent right before shipping, often because it is faster and cheaper than mechanical processing. It feels pleasant already in the store, but the layer usually washes out after a few washes, and the fabric then feels noticeably different, often stiffer than it did at the time of purchase. See bamboo t-shirt for women.

How to notice the difference yourself

Wash the garment once following the usual instructions and feel it again once it is dry. If it is still just as soft, the softness is genuine and sits in the fabric itself. If it feels noticeably rougher or stiffer, that was a layer that has now washed off the surface.

Why bamboo viscose starts out soft

Bamboo viscose has a naturally fine and smooth fiber structure that makes the fabric soft from the very start, without needing an extra chemical layer on top. That is part of why the fabric often feels pleasant against skin across many seasons, even after repeated washing in an ordinary machine at home.

What happens to the fabric over time

With regular wear and washing, the mechanical processing effectively continues at home, much as it does in production, and the fibers keep relaxing a little. That is why a garment can actually become slightly softer over time instead of stiffer, as long as it is washed gently and not dried at too high a heat.

How fabric softener affects the result

Fabric softener lays a thin chemical layer on the fibers, much like chemical softening in production, and therefore works the same way over time. It feels soft right after washing, but the layer gradually builds up and can make the fabric less breathable. For bamboo viscose it is often unnecessary, because the fiber is already soft.

How to use vinegar instead

Vinegar in the softener compartment dissolves lime and soap residue that would otherwise settle on the fibers and make the fabric stiffer over time. It leaves no layer behind, unlike softener, and therefore does not affect the fabric's breathability. See bamboo underwear for women for garments where that difference is most noticeable.

Why new clothes sometimes feel stiff

New clothes can feel stiff because a production residue sits in the fabric, often from transport or from a temporary treatment that keeps the garment looking neat on the hanger in the store. It usually disappears after a couple of ordinary washes at home, after which the fabric's own natural structure takes over the feel.

What you can do to keep the softness

Wash at a low temperature, avoid overloading the machine, and let the garment air dry rather than using a tumble dryer whenever possible. See bamboo clothing for women for more examples of garments that keep their original softness longest when treated gently throughout their entire lifetime.

Frequently asked questions

Can you soften fabric yourself at home

Yes, with vinegar in the softener compartment, which removes lime and soap residue without leaving a layer behind. Ordinary fabric softener does the opposite over time and can make the fabric less breathable.

Does bamboo viscose get softer over time

A little, yes. It starts out soft already and changes less than, say, cotton, but repeated gentle washing can make the fibers a bit more relaxed as time goes on.

Why does new clothing sometimes feel stiff at purchase

Because a production residue or a temporary treatment often sits in the fabric from transport and storage. It usually disappears after a couple of washes at home.

You can find the full range at Bamboo-Clothing.com.