If you want a small bag to carry your business on a daily basis, this bag will do. But some remarks: the seams are simple, they are not doubled. The fabric of the bag has no Teflon layers, and although it is lined inside with plastic, water will enter by the closures. Closures not YKK therefore not self-healing, not waterproof. It will not expose the bag to rain without protection on-sac, and it will not fill up or risk seeing the seams crack. For the price, yes, it's a very handy bag that you can walk every day and relatively resistant.
If you want a bag for hiking, it is not. For this, I invite you to pay more (around 130-150 euro to give you an idea) or by taking maxpedition 5.11 (maxpedition> 5.11 resistance). What you have in the original version is a bag with a light fabric (in past,> 1000) with Teflon multilayer (3 maxpedition in memory), waterproof YKK systematic closures and double stitching, when this is not the Triple Couture. It's expensive, yes, but this is a bag that you will keep more than 10 years at that price.
Amazon offers excellent models like the Typhoon in maxpedition or the models in 5.11 Rush (I own the Rush72 which is monstrous in payload capacity, very resistant to abrasion) and the Typhoon in maxpedition (in my opinion, EDC bag ideal for compactness / payload).
This small bag I use it for my daily home / work trips by motorcycle: tiny, no more than the back, do not mind head movements when wearing a helmet. I recommend it for daily use, low payload, and not subject to significantly rain.