Bamboo underwear and how to wash it without ruining it
Short answer: Wash at 40 degrees, without fabric softener, in a mesh bag and with low heat when drying. Those four things extend the life of your underwear more than the quality gap between two price levels, and they take hardly any extra time.
40 degrees is enough
Skin oils and skin cells loosen at 40 degrees, and that is what needs washing out of everyday underwear. A higher temperature does not make it cleaner, but it wears the elastic faster and can shrink the fabric. Pick a normal 40 degree programme with a mild detergent. See washing and care.
Fabric softener makes it worse
Fabric softener leaves a thin film on the fibres. That film blocks moisture transport, which is the whole reason bamboo viscose keeps skin dry. The fabric may feel soft straight after washing, but it absorbs less moisture and can hold on to odour. Leave it out. See bamboo underwear for men.
A mesh bag protects the edges
In a mesh bag, underwear cannot wrap around zips, buttons and underwires from the rest of the load. That is exactly where most waistbands get stretched and thin fabrics get small holes. A simple mesh bag is enough, and it also keeps socks and small pieces together.
Heat ruins the elastic
Elastane loses its stretch through heat, not through wear. A hot tumble dryer breaks down a waistband faster than weeks of daily use. So dry on low heat or hang your underwear up. It dries quickly because the fabric is thin, and the waistband keeps its grip longer. See bamboo boxers for men.
Turn it inside out
Friction in the machine hits the outer side of the fabric. Turn a piece inside out and the wear falls on the inside instead, so the colour stays looking good for longer. This matters most for dark colours, which otherwise turn grey and dull over time. See bamboo undershirts for men.
Wash light and dark apart
New dark pieces can release a little dye in the first few washes. Wash them with similar colours so lighter items do not turn greyish. If you keep to a few colours in the drawer, it is easy to gather a full load of the same kind and skip sorting each time.
Do not overfill the machine
When the drum is packed full, water and detergent cannot circulate properly. Clothes are not rinsed well, and detergent residue stays in the fabric. Leave a hand's width of space above the laundry in the drum. That also means less friction between items and so less wear.
Spinning and hanging
A moderate spin speed is enough for underwear. Very high speeds press the fabric hard against the drum and can leave curled edges. Give each piece a light shake as you take it out, and hang it by the waistband or lay it flat on a rack so it dries in shape.
In short
Four simple habits make the biggest difference: 40 degrees, no softener, a mesh bag and low heat when drying. Turn pieces inside out and do not overfill the machine. Your underwear then keeps its shape and colour longer, and you need to replace it less often.
Frequently asked questions
What temperature for underwear?
40 degrees for everyday washing. That is enough to loosen skin oils and skin cells. Use 60 degrees only during illness, as the higher heat wears on the elastic.
Can bamboo underwear be tumble dried?
Yes, on low heat. High heat ruins the elastic in the waistband, so air drying or a gentle programme is the best choice to keep the shape.
Why avoid fabric softener?
It leaves a film on the fibres that blocks moisture transport through the fabric. The viscose absorbs less moisture and can hold on to odour, so the underwear works less well.
See our range of Boody underwear.
