Natural vs synthetic fabrics: what's the difference?

Natural fabrics are derived from plant or animal sources — cotton, linen, hemp, silk, wool, and alpaca are all natural fibers. Synthetic fabrics are manufactured from petrochemicals (fossil fuels) through industrial chemical processes — polyester, nylon, acrylic, and spandex are the most common. Regenerated cellulose fibers like Tencel lyocell and modal fall in between: they start from natural plant material but undergo chemical processing to become usable fibers, often classified as semi-synthetic.

The most significant practical differences relate to end of life and microplastic pollution. Natural and regenerated cellulose fibers biodegrade, returning to the earth without leaving lasting pollution. Synthetic fibers are essentially plastics — they do not biodegrade, they shed microplastic particles during washing, and they persist in landfills and oceans for hundreds of years. Approximately 60% of all clothing produced globally is made from polyester alone, making fashion one of the largest contributors to plastic pollution.

Performance differences exist but are narrowing. Synthetics have traditionally dominated activewear due to their stretch, moisture-wicking, and durability. However, innovations in natural fiber processing mean that fabrics like Tencel, merino wool, and advanced hemp blends now match synthetic performance for most applications. At ONDU, every brand we feature proves that you do not need plastic to get high-performance results — from Reprise's Tencel leggings to Icebreaker's merino base layers to Promeed's mulberry silk sleepwear.