Why cotton is the best fabric for Indian summers (and what to look for when buying it)
What makes cotton so good in the heat
Walk into any traditional Indian home in May and you'll notice something. The curtains are cotton. The bedsheet is cotton. Someone's grandmother is wearing a cotton saree. There's a reason for that, and it's not just nostalgia.
Cotton is a natural fibre, and its structure makes it genuinely good at managing heat. The fibres absorb moisture, up to about 27 times their own weight, which means sweat gets pulled away from your skin instead of sitting on top of it. Once the moisture is in the fabric, it evaporates. That evaporation cools you down. It's a simple process, but it works remarkably well when you're dealing with a Delhi summer at 43 degrees or a Mumbai afternoon with 80% humidity.
Cotton also lets air move through it. The weave structure creates tiny gaps that allow airflow, so you're not sealed in. Synthetic fabrics tend to trap heat close to the body. Cotton lets it escape.
Cotton vs polyester: the honest comparison
Polyester is cheap, easy to produce, and doesn't wrinkle much. Those are its genuine advantages. But when it comes to heat, it struggles.
Polyester is a plastic-based fibre. It doesn't absorb moisture. Sweat sits on the surface of the fabric, and your body stays damp. In a dry heat like Rajasthan, that's uncomfortable. In humid heat like Kolkata or coastal cities, it's genuinely unpleasant. The fabric also tends to hold body odour over time because it can't flush moisture out the way cotton does.
Here's a quick way to think about the difference:
- Cotton absorbs moisture and releases it. Polyester repels moisture and traps it.
- Cotton gets softer with every wash. Polyester tends to pill and hold static.
- Cotton is biodegradable. Polyester sheds microplastics with every wash cycle.
- Cotton breathes in both dry and humid heat. Polyester struggles in both.
The one place polyester has an edge is durability for certain applications, like activewear where you need stretch and quick-dry properties. But for home use and everyday summer wear in India, cotton wins without much contest.
Not all cotton is the same
This is where it gets interesting. Cotton isn't one thing. The weave, the thread count, and the processing all change how a cotton fabric actually feels.
Mulmul (muslin) is the lightest option. It has a very open weave and almost floats on the skin. It's what you want for sheer curtains, baby clothes, and anything you need to feel like almost nothing is there. Mulmul washes beautifully and gets even softer over time.
Cambric is tighter and smoother, good for quilts and pillow covers where you want a crisp feel. Voile sits somewhere between mulmul and cambric. Khadi has more texture and weight, better for cooler months but still breathable compared to synthetics.
For summer specifically, lighter weaves are your friend. A mulmul curtain, for example, lets a breeze pass through while still giving you some privacy. A heavy cotton cambric quilt in summer might feel too warm, but the same quilt works well as a light cover during an air-conditioned night.
These Green Banyan Tree Block Print Sheer Curtains are made from mulmul cotton. They let light filter through softly and allow airflow, which makes them a good fit for rooms that get a lot of afternoon sun.
Cotton at home: beyond just clothing
Most people think about cotton for clothing first. But what's on your bed, your windows, and your floor matters just as much when temperatures rise.
A cotton quilt used in summer is a different thing from a heavy winter razai. Summer quilts tend to use lighter cotton filling or just layers of soft cotton fabric. They're breathable enough to sleep under even without air conditioning, which is how most of India actually sleeps through April and May.
For babies and toddlers especially, cotton is the only fabric that makes sense. Small children can't regulate their body temperature well, and synthetic fabrics can make them overheat quickly. A light hand block print cotton quilt works as both a play mat and a light cover, and it washes easily after the inevitable spills.
Cotton curtains do more than look good. In rooms that face west, sheer cotton curtains can cut glare and reduce the feeling of heat coming through the glass, while keeping the room from feeling sealed off. That matters when you're trying to reduce how long the AC runs.
Cotton bags, table covers, and cushion covers also hold up better in humid conditions than synthetic alternatives, which can start to smell if they stay damp.
Even smaller everyday items, like this block print cotton laptop sleeve, benefit from cotton's breathability. Electronics generate heat, and a cotton sleeve handles that better than a neoprene or polyester one on a warm day.
How to care for cotton so it lasts
Cotton is forgiving, but hand block printed cotton needs a little more thought. The natural dyes used in block printing can fade if you're not careful.
A few things that actually help:
- Wash in cold water for the first few washes to set the dye.
- Avoid harsh detergents. A mild liquid detergent or even a small amount of shampoo works well for printed cotton.
- Don't soak printed fabrics for long periods.
- Dry in shade rather than direct sun, especially for the first few washes.
- Iron on the reverse side to protect the print.
Cotton does wrinkle. That's part of its nature. A light press with a warm iron sorts it out quickly, and over time most people find they don't mind the slight texture that comes with washed cotton. It's what gives a well-used cotton piece its particular character.
If you're storing cotton quilts or curtains during a season change, make sure they're completely dry before folding. Damp cotton stored in a closed space is the fastest way to get a musty smell that's hard to get rid of.
Buy cotton, use it, wash it, use it more. It's a fabric that gets better the more you live with it.
