Bamboo Socks vs. Cotton Socks – The Difference Explained

Short answer: Bamboo socks beat cotton socks on three points: they move moisture better, they slow odour, and they feel softer against the skin. Cotton absorbs sweat and turns wet, while bamboo viscose carries the moisture away, so the foot stays dry and fresh. Cotton has its own advantages in return.

Moisture is the most important difference

Cotton can absorb a lot of moisture but holds on to it, so the sock turns clammy and heavy during the day. Bamboo viscose instead carries the sweat away from the skin and out into the fabric where it can evaporate. The consequence is not felt in the first hour but at the end of the day, when the cotton sock is wet and the bamboo one still feels dry.

Odour follows the moisture

Odour does not come from the sweat itself but from the bacteria that live on it in a damp environment. The longer the fabric holds the moisture, the better the conditions for the bacteria. That is why a cotton sock smells earlier in the day than a bamboo one, even though both are washed equally often and worn by the same foot.

Softness and how you feel it

Cotton fibres are short and have stiff ends that stick out of the thread, and those are what you feel as a slight roughness against the skin. The bamboo viscose thread is smooth all the way along, so it feels softer at first touch and goes on doing so after many washes. For delicate skin that is the difference between comfortable and irritating.

Where cotton is still good enough

On a cool day for a couple of hours, cotton does no harm, and a thick cotton sock is cheap and lasts reasonably well. Cotton also tolerates high wash temperatures better. The problem only appears when the foot sweats for many hours inside a closed shoe, and that is exactly the situation most people are in on an ordinary working day.

Blends and what the percentages mean

Most socks are blends. A sock that is mainly bamboo viscose with a little elastane behaves like bamboo, while one that is mainly cotton with a little bamboo behaves like cotton. Read the percentages in the description rather than going by the name of the item, because the first figure decides how the sock performs.

Washing is almost the same

Both are washed at 30 to 40 degrees, turned inside out and hung to dry. Bamboo viscose tolerates high heat in the dryer less well, because the fibre is weaker when wet. Fabric softener should be avoided in both cases, because it leaves a film in the fibres and closes off the moisture transport that is the whole point. See the range under bamboo socks for men and bamboo socks for women. See also bamboo and temperature regulation, sensitive skin and sweaty and smelly feet.