The backpack arrived as descrived and it took about a month. For the price, comparing to Salomon, it is a great deal. The materials seems good quality and it is stretchable. I'm just slightly disappointed because it did not come with a thermal insulator for the 1.5l hydration pack, since I use it with cold water and you can feel it cold in your back. I used the backpack with 2x450ml flasks for running 21km and it feels good, no hard spots and it feels tight to body. I have 1.70m, 72 kg, size L /XL fit great. I asked the seller to change the full set M to L/XL size when buying. Another negative point is that it kind of ruined my shirt due to friction (photo),but I'll try to put a tape inside to solve it.