Polyamide fiber, Polyester, 260x 150x 75mm.
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($17.99): AFfbG10
2. ($18.59): aff7off
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 99a5c1, 502C6B, e2bcea, TTxBG10, BGOD1, 2019SPEDM, BGBFAFF2019, BGCITYADS2019
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 2 another warehouse/versions!
1. China – Xiaomi 90FUN Travel Urban Waist Bag Blue ($-3)
2. China – Xiaomi 90FUN Travel Urban Waist Bag Red ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaomi 90FUN Travel Urban Waist Bag Black. The lowest price was: $11.98.
Price records source(s): 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)).