My Sister Sat Through A February Lunch In Long Sleeves, Perfectly Comfortable, While I Cooked In A Sleeveless Top.

A note from a reader about the small Australian boutique blouse that got her arms covered through a Perth summer and made her cooler, not hotter.

I am 52 years old, and I spent about fifteen summers being hot on purpose because I had the physics backwards.

I will tell you how I found out, because I did not work it out myself. My sister Carol had to point at it twice.

It was an outdoor lunch in February, under one of those shade sails that makes no difference after about one o’clock. I was in a sleeveless top, the way I have been in every February since my forties, and I was wretched. Carol was sitting opposite me in a striped blouse with long sleeves, entirely comfortable, on her second coffee.

I said something about how she must be dying in that. She looked at me, and then she looked at my bare arms going pink in the sun, and she said it.

What it is

The blouse is called the Rhea, and it comes from a small Australian boutique called Perth Boutique that Carol found and has mentioned at every opportunity since.

It is a softly striped blouse with long sleeves and a relaxed crew neckline. The cut is loose, though not billowing — it has a shape to it. The fabric is light and it breathes, and that is the part the whole letter turns on. It comes in three colours, a blue, a khaki and a grey, and it works tucked in or left out.

But I want to be honest about what actually changed for me, because it is not really about the blouse.

It is that long sleeves made me cooler. Not more covered. Cooler.

I had believed, without ever once examining it, that there were two options available to a woman in a Perth summer. Cover your arms and be hot, or go sleeveless and be comfortable. I had been choosing the second one for fifteen years and feeling rather sensible about it.

The blue one. Carol has the khaki and has made it clear she had it first.

You are not hot because you are covered up, Maggie. You are hot because you are not.

Carol explained it twice

She had to, because the first time I did not take it in. I nodded and changed the subject and went home and got the aloe out for my arms.

The second time she put it in a way I could not get around. She asked me to name a hot country where people go about with their arms bare all day. I had a think and could not.

Then she said, there is a reason for that, and it is not modesty.

Bare skin in direct sun means the sun is on you. There is nothing between the heat and your arm. A light, loose sleeve puts a layer of shade over you and leaves a gap underneath that air can move through, and moving air over slightly damp skin is the only cooling system a body actually has. The sleeve is not holding heat in. It is keeping the sun off and letting the breeze do its work.

Which means the thing that matters is not whether a sleeve is long. It is whether the fabric is light enough to breathe and loose enough to let the air underneath. A heavy sleeve, or a tight one, is genuinely awful. I had taken one bad experience with a heavy long sleeve in about 2009 and turned it into a law of nature.

Name me a hot country where people walk around all day with their arms bare, she said. There is a reason, and it is not modesty.

→ Read about the Rhea

What changed in three weeks

I had not been looking for a blouse. I had been quietly accepting, every summer, that three months of the year I would be uncomfortable and slightly self conscious at the same time, which is a poor combination.

Because the other half of this, and I may as well say it, is that I have not much liked my upper arms since my forties. So every February I was choosing between being hot and being covered, and I had decided that being hot was the lesser problem. It did not occur to me that I was choosing between two things that were not actually opposites.

The Rhea removed the choice, which is a different thing from solving either half of it.

Three things I noticed in the first few weeks, and I wrote them down because I knew I would want to remember.

1. Light and loose is the whole specification. Not the sleeve length. If the fabric breathes and the cut leaves a gap, a long sleeve is cooler in the sun than no sleeve. If it does not, no length will save you.

2. The stripe is doing quiet work. A soft stripe gives the eye something to follow, so a plain loose blouse stops looking like a plain loose blouse. It is the only thing going on and it is enough.

3. Tucked and untucked are two different garments. Out, it skims and I forget about it. Tucked into a skirt with a belt, there is a waist again. I had not owned anything that would do both for a very long time.

What I’d tell you if we were friends

If we were on my back verandah with a cold drink and you asked me whether you should order one, this is what I would say.

I would tell you to stop thinking about sleeve length and start thinking about fabric weight, because that is the variable that was hiding from me for fifteen years. Everything I believed about long sleeves in summer came from one heavy blouse a long time ago.

I would tell you the blue is the one I reach for, the khaki is Carol’s and I can see why, and the grey is the one I would buy next.

I would tell you to buy two if you are going to wear them the way I do, because the discount stacks as you add colours and I did not know that until after I had ordered one.

I would also tell you, because I would rather you heard it from me, that the listing does not say what the fabric is made of. It is light and it breathes and it has not let me down in the heat, which is what I can speak to. If the composition matters to you, ask them before you order.

It is $73.99, down from $199.00, and the sizes run from a small to a 2XL. It runs true to size, and if you are between two it is worth taking the larger, because the whole point is the gap between you and the sleeve. There is free shipping Australia-wide and thirty days to send it back, which is the only reason I was willing to test a theory about physics on my own arms.

— Maggie