Why Wool Scratches – And Bamboo Does Not
Short answer: Wool itches because wool fibres are relatively thick and stiff with a scaly surface that prickles the skin. Bamboo viscose is the opposite: long, smooth and round fibres that glide over the skin. That is why bamboo rarely itches, even for many people with sensitive skin.
Why some clothing itches
When a fibre is stiff enough, it does not bend when it meets the skin. Instead it prickles, and the nerves in the skin register that as itching. The thicker and stiffer the fibres, the more you notice it. That explains why two jumpers in the same material can feel very different.
The scales of wool
Wool fibres have a surface of tiny scales, a bit like roof tiles. Those scales help make wool warm and elastic, but they also make the fibre rough. Combined with the thickness of the fibres, this can make even a cosy wool jumper hard to wear directly against the body for long.
Thickness matters a lot
Not all wool itches equally. Fine wool with thin fibres feels softer than coarse wool, because thin fibres bend more easily against the skin. Many people can wear fine wool but not coarse wool. If you are unsure, try the jumper against the inside of your arm.
The smooth fibres of bamboo viscose
Bamboo viscose has long, round and smooth fibres without scales. They lie flat against the skin and glide rather than prickle. That is why bamboo feels soft from the first time you put it on, and it does not itch, not even after many hours under other clothes.
Warmth without the itch
Bamboo does not warm as much as wool in hard frost, but as the innermost layer it gives comfortable insulation without irritation. A pair of bamboo long johns under your trousers holds in warmth on cold days and works well with wool or thick trousers on top.
For him
For men, a bamboo undershirt for men is a good base layer under a shirt or knit. It lies smoothly against the skin, while the warmer jumper on top can be wool. Browse the rest of the bamboo clothing for men if you want more soft basics.
For her
For women, a bamboo undershirt for women works the same way. It gives a soft layer against the skin, so a wool cardigan or knitted dress can be worn without itching. Choose a close fitting style so it does not bunch up under your other clothes.
Wool and bamboo together
You do not have to choose between wool and bamboo. The best solution is often to combine them: bamboo next to the skin and wool on top for warmth. That way you get the insulation of wool and the softness of bamboo. It is a simple way to wear your favourite jumper, even if it itches.
For sensitive skin
If your skin reacts to wool, bamboo is an obvious alternative for the innermost layer. Many people with sensitive skin experience less irritation because the fibres are smooth. Skin differs, though, and if you have eczema or persistent itching, it is a good idea to talk to your doctor.
Caring for the base layer
Wash bamboo at 30 to 40 degrees without fabric softener and let it air dry. Softener and the tumble dryer can make the fibres stick out and the fabric less soft over time. Keep the fibres smooth, and the base layer keeps its soft feel against the skin winter after winter. See also bamboo as a base layer in winter and bamboo clothing for sensitive skin.
Frequently asked questions
Why does wool itch?
Wool fibres are relatively thick and stiff with a scaly surface that prickles the skin. The coarser the wool, the more you notice it, while fine wool often feels softer.
Does bamboo itch?
Rarely. Bamboo viscose has long, round and smooth fibres without scales, so the fabric glides over the skin instead of prickling, even when you wear it all day.
Can I wear bamboo under wool?
Yes, it is a good combination. Bamboo next to the skin gives a soft layer, and wool on top provides warmth, so you get the benefits of both materials.
You can find the full range at Bamboo-Clothing.com.
