Polyester vs. Viscose: Which Fabric Wins for Comfort, Cost & Eco Impact?
Polyester is a synthetic petroleum-based fibre spun into plastic yarn; viscose is a semi-synthetic made by dissolving cellulose from trees into a chemical slurry and regenerating it into filament.
Shoppers see both hanging beside each other in fast-fashion stores, feel a silky drape, and assume “polyester = cheap, viscose = natural.” The overlap in sheen and price tags makes the swap feel harmless—until you wash them and notice pilling versus shrinking.
Key Differences
Comfort: polyester traps heat and static; viscose breathes like cotton but wrinkles fast. Cost: polyester is cheaper per metre; viscose fluctuates with pulp prices. Eco Impact: polyester sheds micro-plastics; viscose can drive deforestation unless sourced from FSC forests and closed-loop mills.
Which One Should You Choose?
Hot, sweaty commute? Pick recycled polyester with moisture-wicking knit. All-day office wear? Go for Lenzing Ecovero viscose blended with elastane. Check the label for GRS or FSC logos to shrink your footprint either way.
Examples and Daily Life
Gym tees labelled “performance polyester” survive chlorine and dryers. Summer sundresses marketed as “rayon” are usually viscose—hand-wash cold unless you want a crop top. Second-hand stores are full of both; read the tag before the till.
Does viscose shrink in the dryer?
Yes—high heat relaxes the cellulose fibres, so line-dry or use a cool cycle.
Is recycled polyester better for the planet?
It cuts oil use and waste, yet still sheds micro-plastics; wash in a Guppyfriend bag.
Can I iron viscose safely?
Use a medium-hot iron inside-out with steam; keep moving to avoid shiny patches.