Bamboo underwear and why the material is listed as viscose
Short answer: The label says viscose because that is the technical name of the fibre. Bamboo is the raw material, viscose is the process the raw material goes through, and the labelling follows the fibre, not the plant.
Raw material and fibre
Bamboo is a plant, and viscose is the fibre that results from dissolving plant pulp and spinning it again. The plant is not woven directly into fabric. It goes through a process where the cellulose is extracted and formed into long, smooth threads. Those threads become the fabric you feel against your skin.
The rules require the fibre name
Textile labelling rules require the name of the fibre, not the plant. That is why the label says viscose, even when the raw material is bamboo. It is not an attempt to hide anything, but the way the composition has to be stated. The same principle applies to every other fibre. See bamboo underwear for women.
Why it does not say bamboo
Bamboo alone would describe the raw material, not the fibre. The rules are the same for viscose from bamboo, eucalyptus or beech, so all three are called viscose on the label. When you see the word bamboo in a product title or description, it tells you where the raw material comes from. The label tells you the fibre.
What the process does
When the plant pulp is dissolved and spun again, the fibre becomes smooth and even. That is why the fabric feels soft and drapes well. The properties come from the fibre and how it is spun, not from the plant itself. It also explains why viscose from different plants behaves almost the same in wear and in the wash.
What it means for you
For you as a wearer, it means looking at the fabric and the fit rather than the raw material alone. Viscose is soft and cool against the skin, but it needs a little care in the wash to stay nice for longer. To read more about the raw material and the path from plant to fabric, see facts about bamboo.
Elastane in the composition
Underwear is rarely made of pure viscose. There is usually a smaller share of elastane, which adds stretch and makes the fabric spring back after wear. Without elastane, briefs and boxers would lose their shape quickly. That is why the label often lists two or three fibres, each with its percentage, and that is completely normal.
Where to find the information
The composition is always on the product page and on the label in the garment. With a pair in your hand, the label usually sits at the side or by the waistband. Online you find it in the product description. If you are unsure what a fibre name means, compare it with a label you already know. See bamboo briefs.
Washing and caring for viscose
Viscose tolerates less when it is wet, so it should be treated a little more gently in the wash than cotton. Wash at 40 degrees, use a mild detergent and avoid high heat in the tumble dryer. The fabric then keeps its softness, and the elastane holds its stretch for longer. Hang it to dry if you have room.
In short
Bamboo is the raw material, viscose is the fibre, and the label has to show the fibre. That is why your bamboo underwear says viscose, just like clothing made from eucalyptus or beech viscose. The properties come from the process and the fibre. Check the product page or the label if you want to see the exact composition.
Frequently asked questions
Why does the label say viscose and not bamboo?
Because labelling rules require the name of the fibre. Bamboo is the raw material, viscose is the fibre, and the fibre is what has to appear on the label, whatever plant it comes from.
Is bamboo viscose the same as regular viscose?
It is the same type of fibre. The raw material is bamboo instead of eucalyptus or beech, but the process is the same, so the fabrics behave almost alike in everyday wear.
Where can I see the composition?
On the product page and on the label in the garment itself. The label usually sits at the side or by the waistband and lists each fibre with its percentage.
See our range of Boody underwear.
