Soft and breathable cotton, absorbs moisture.
Price history, coupons and price alert are available on this page. Do you want to know what the best price is?
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
1. ($17.99): BGOD1
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 502C6B, e2bcea, 2019SPEDM, AFfbG10
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 2 another warehouse/versions!
1. China – Xiaomi Youpin Baseball Cap Light Gray ($-3)
2. China – Xiaomi Youpin Baseball Cap Lapis Blue ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi Baseball Cap Black. The lowest price was: $7.21.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).