Why Pure Cotton is Better Than Blends
Cotton-polyester blends are cheaper and easier to care for — but they come with real downsides. Here is why 100% pure cotton is worth the extra care.
Walk into any fast-fashion retailer and almost everything says "cotton" on the label — but look closely and it is "60% cotton, 40% polyester" or some variation. Blending cotton with synthetics is not inherently dishonest, but it does change what you are wearing in ways most people do not realise.
Breathability
Pure cotton is naturally breathable because its fibres are hollow and absorb moisture. When you sweat, cotton wicks moisture away from your skin and releases it into the air. Polyester does the opposite — it traps moisture and heat against your body, which is why polyester-blend shirts feel sticky in Indian summers. Even a 20–30% polyester content noticeably reduces breathability.
Skin comfort
Synthetic fibres have a slightly rough microstructure at the microscopic level. For most people this is imperceptible, but for those with sensitive skin or eczema, polyester blends can cause irritation, redness, and itching. Pure cotton is hypoallergenic and recommended by dermatologists for sensitive skin — including for infants and children.
Microplastic pollution
Every time a polyester or polyester-blend garment is washed, it sheds thousands of microscopic plastic fibres (microplastics) into the water. These pass through wastewater treatment plants and enter rivers, oceans, and eventually the food chain. 100% cotton sheds only natural cellulose fibres, which biodegrade completely.
Longevity and repairability
Pure cotton ages gracefully. It softens over time, takes on character, and — crucially — it can be repaired with needle and thread without the repair being obvious. Polyester blend fabrics pill, develop shiny patches at friction points, and resist invisible mending. A well-made pure cotton garment worn and washed regularly can last a decade. A blend will typically start visibly degrading within 18–24 months.
The case for blends
To be fair: polyester blends do resist wrinkles better, dry faster, and are cheaper to produce. For activewear, performance fabrics, or items that need to hold a precise shape (like some trousers), blends have legitimate advantages. We are not anti-blend. We are pro-cotton — specifically for the kind of relaxed, everyday, close-to-the-skin clothing that QOTN makes.