I bought this specialized hat for a three-month period. I needed a light, summer cap for fishing and hiking. This specific product—the 'Baseball Cap Mens Spring and Summer Sun Protection Fishing Hat Outdoor Korean Style Foldable Womens Casual Sun Hat Sun-Poof Pe White-Adjustable'—has a ridiculously long name. I've been using these mens baseball hats for 90 days, testing their biggest claim: foldability and sun protection. Here’s my day-by-day breakdown.
Don't buy any foldable cap until you read this report. Most cheap foldable hats fall apart fast. This one had to pass three main tests:
The package was small. That’s because the hat came folded already. My first thought was simple: this is too thin. When you spend under $20 on a hat, you expect heavy stitching and thick canvas. This cap was the opposite. It was almost airy.
The "Korean Style" look means the brim is slightly curved, not flat like a standard street cap. The material felt like thin nylon or quick-dry polyester. This concerned me. Thin plating on jewelry means it fades in one week. Does thin fabric mean it rips in one week?
The folding mechanism felt clever. The brim has a hidden seam in the middle, letting you fold it into a small taco shape. I looked at the adjustable strap. It uses a plastic buckle, not velcro. The stitching around the eyelets was clean and straight. That’s a good sign, usually.

I checked the material label (or lack thereof). Since it didn't clearly state 316L (the best steel for non-rusting), I assumed the material was just standard polyester. For a hat, that's fine, but it needs ventilation.
Verdict: Skeptical. It feels cheap, but the stitching quality is promising. I must test its cooling ability immediately.
I wore the hat every day of Week 1 while doing yard work and walking the dog. The sun was hot, hitting 85°F.
The hat’s size is genuinely adjustable. I have a big head, and my friend has a smaller one. We tested the fit easily. The plastic clasp held tight without slipping. Note this: make sure your adjustable strap is not flimsy. If it is too thin, it will slip when you sweat.
The biggest surprise was the ventilation. Because the fabric is so thin, it actually helped keep my head cool. A thick cotton cap traps all the heat. This one let the air flow.
I started practicing the fold. Step 1: Fold the brim at the central seam. Step 2: Roll the rest of the fabric around the brim. Step 3: Tuck it into my back pocket. I did this 15 times this week. The brim showed no creasing or cracking. This feature is huge for travel.
Verdict: The thinness is a benefit, not a drawback, for summer use. Folding works as advertised. It passed the comfort test.