I have checked all old coupons and price is 9.85 USD for Wool Repair Cap LED (in Banggood). Just check coupons out (with price alert and history). Do you want to know what the best price is?
Latest coupon and price update (UTC):
Banggood (9.85 USD)
Banggood warehouse is located in China. Well, is it a good price anyway? Well, this price is higher than average price (9.25 USD) You can get coupon down below.
Link: Banggood product page
Price without coupon: 10.95 USD
Coupon (9.85 USD): BGAMMT03
(CouponsFromChina.com tip: you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGSCM75, BG589b2e, BGSCM11, BGCAR639
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
Click here… to search for USB Rechargeable Wool Repair Cap LED Warm Hat on Aliexpress
Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for USB Rechargeable Wool Repair Cap LED Warm Hat? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).