I understand the struggle. You want to look stylish while keeping your head cool under the summer sun. To refresh my warm-weather wardrobe, I decided to pick up a few breathable cotton beanies.
I assumed buying a simple cotton hat would be straightforward. That was a serious error. I ended up wasting money, sweating through poorly made hats, and getting tangled in unfair return policies. I made these mistakes so you can avoid the same hassle.
Learn from my experience. If you follow these straightforward steps, you'll end up with a quality hat that genuinely keeps you cool:

To save a few dollars, I bought the least expensive cotton beanie I found on a random website. It was a complete letdown. I saw the low price and thought, "How different can one cotton hat be from another?"
The difference is enormous. The cheap hat was paper-thin and lost its shape after a single wash. The stitching was poor, and the dye began to run as soon as I started sweating. In the end, I spent more money replacing three cheap hats than I would have on one quality beanie from the start.
The lesson here: If a price seems too good to be true, the material is likely subpar. Extremely cheap hats often use low-grade cotton or, worse, polyester blends that trap heat—defeating the entire purpose of a breathable summer beanie.
Verdict: Don't buy the cheapest hat. Look for quality stitching and a seller with a solid reputation.
I saw the word "cotton" and stopped reading. That was my biggest oversight. Just because something is made of cotton doesn't mean it's breathable. A thick knit cotton beanie is perfect for fall but a terrible choice for July.
I purchased a hat that appeared lightweight online but was actually a tight, heavy rib knit. I wore it outside for just five minutes, and my head was drenched. I had bought a sweat sponge, not a cooling hat.
When shopping for summer heat, you need a specific type of fabric construction. Look for: