Does Rayon or Viscose Smell When You Sweat?
Half the kurtis and many of the soft summer shirts sold in India are rayon or viscose. They feel cool, they drape well, and people worry they will smell like polyester. Mostly, they do not. Here is why, and how to look after them.
Does rayon smell when you sweat?
Less than polyester. Rayon, viscose, modal and lyocell are regenerated cellulose, the same base material as cotton, and a 2024 University of Alberta study found cotton and viscose took up and released smaller amounts of odour compounds than polyester, nylon and wool. They still smell if worn again unwashed after a sweaty day, and they are weaker when wet, so wash them gently.
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Clothing deodorant: neutralizes sweat, smoke and food smell in the fabric. Never on skin.
Use it when a shirt, kurta or pair of jeans looks clean but holds a little of yesterday's sweat.
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See how ODORSTRIKE worksIn this guide6 sections
- What are rayon, viscose, modal and bamboo fabric?
- Do viscose and rayon hold sweat smell like polyester?
- Why does my rayon kurti still smell under the arms?
- How do you wash rayon and viscose without ruining them?
- How do you refresh a rayon kurti between washes?
- Is rayon or cotton better for Indian summer?
Look at the label of a printed kurti, a flowy summer shirt or a soft "bamboo" tee bought in India and it will often say rayon, viscose or modal. These fabrics are everywhere because they are cool and cheap to dye. The question people ask after the first hot day is whether they hold sweat smell like polyester does.
What are rayon, viscose, modal and bamboo fabric?
All four are regenerated cellulose: plant pulp dissolved and spun back into fibre. Viscose is the most common type of rayon; modal and lyocell are made by related processes.
"Bamboo" clothing is usually bamboo rayon or viscose: bamboo pulp turned into the same kind of fibre. Regulators take the difference seriously. In 2022 two large US retailers agreed to pay $5.5 million in combined penalties for marketing rayon products as bamboo. For smell, what matters is that all of these are cellulose, like cotton, not plastic, like polyester.
Do viscose and rayon hold sweat smell like polyester?
No. In a 2024 study, cotton and viscose absorbed and released smaller amounts of odour compounds than polyester, nylon and wool.
Cotton
Cellulose
- Absorbs sweat
- Holds less odour than synthetics
- Tough enough to wash hard
Viscose, rayon, modal
Cellulose
- Absorbs sweat, feels cool
- Held less odour than polyester in a 2024 study
- Weaker when wet: wash gently
Polyester
Synthetic
- Attracts oily odour compounds
- Can keep smelling after a wash
- Dries fast
Researchers at the University of Alberta soaked fibres in simulated sweat and measured what they took up. Polyester attracts the oily, water-hating compounds in sweat and holds on to them; cellulose fibres like cotton and viscose are water-loving and took up less. That matches what most people notice: a viscose kurti smells after a long day, but it does not keep that sour, stuck-on smell the way a polyester gym tee does. Our guide on why polyester holds odour longer than cotton covers the polyester side.
Why does my rayon kurti still smell under the arms?
Because it absorbs a lot of sweat, and absorbent fabric stays damp longer on a humid day.
Rayon soaks up sweat readily, which is why it feels cool. On a Mumbai or Chennai afternoon the underarm panels can stay damp for hours, and skin bacteria break that sweat down into smell. Wear it again the next day without washing and the smell starts from where it left off. Fitted armholes and linings make it worse, because the fabric stays pressed against the skin.
How do you wash rayon and viscose without ruining them?
Gently. Rayon is weaker when wet, so treat it like a delicate.
- Check the label first. Some rayon garments are marked dry clean only.
- Wash in cool water on a gentle cycle, or by hand, inside out.
- Do not wring or twist. Press the water out in a towel.
- Dry flat or on a hanger in shade; strong sun can fade prints.
- Iron on a low setting, inside out, while slightly damp.
How do you refresh a rayon kurti between washes?
Air it inside out, then treat the underarms once it is dry.
Hang it inside out under a fan the evening you take it off; damp rayon should never go back into a cupboard. Before the next wear, if it is washable and not marked dry clean only, mist the underarm panels and neckline with a fabric odor spray made for kurtis and shirts from 15–20 cm. ODORSTRIKE dries clear with no stiff residue in 15–30 seconds. If the print is new or the dye looks loose, test it on an inside seam first. One extra wear is reasonable; a kurti that has done two sweaty days needs a wash.
Is rayon or cotton better for Indian summer?
Both are good choices; polyester is the one to avoid on long sweaty days.
Rayon drapes and feels cooler against the skin; cotton is tougher, easier to wash hard and lasts longer. For a full day out in the heat, either beats a polyester blend for smell. More on summer fabrics in our guide to keeping linen and cotton kurtas fresh.
Viscose holds less odour than polyester, not none. A sweaty kurti still needs washing, and a fabric spray is for clean clothes between washes. Never spray a garment labelled dry clean only.
Sources
McQueen, R. H., Eyres, G. T. and Laing, R. M. Textile sorption and release of odorous volatile organic compounds from a synthetic sweat solution. Textile Research Journal, 2024. doi.org
US Department of Justice / Federal Trade Commission Kohl's and Walmart agree to pay $5.5 million in combined penalties over rayon products marketed as bamboo. Press release, 2022. justice.gov
Frequently Asked Questions
Is viscose the same as rayon?
Viscose is the most common kind of rayon. Modal and lyocell are related regenerated cellulose fibres.
Does bamboo fabric smell less?
Most bamboo clothing is bamboo rayon or viscose, so it behaves like other cellulose fabrics: better than polyester, similar to cotton.
Can I machine wash a rayon kurti?
Often yes, on a gentle, cool cycle and inside out, if the label allows. Rayon is weaker when wet, so avoid wringing it.
Why does my viscose shirt smell after one day?
It absorbs sweat and stays damp longer in humid weather, so bacteria have time to make smell. Air it the same evening and wash it after a sweaty day.
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