100 percent polyester, water-resistant, breathable, Capacity: 17L, Size: 30.5x 14x 40cm, Shoulder strap length: 45 – 90cm.
Just check coupons out (with price alert and history). Best price?
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. ($56.70): BGTY704CP
2. ($56.70): BGHONEY2110
3. ($56.70): BG10OFFAFF
4. ($56.70): BGwhielabel
apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): AFfbG10, 502C6B, BGBFAFF2019, BGCITYADS2019, BGOL786, BGMPB2020, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGCAMP01, BGROIIHG, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, BGCuponation10
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for Xiaomi Men Classical Business Laptop Backpack? There we go. The lowest price was: $19.99.
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)).