As the title suggests, finally a backpack that not only has a thousand functions and different devices, but also focuses heavily on waterproofing, and I'm not talking about the classic and pseudo useless water repellency, but 100% waterproof with an IPX -6 certificate that ensures complete protection against any type of rain. The backpack is very light, practical and comfortable to wear, even over long periods of time. The zippers seem very durable, as does the fabric of the backpack. I had the opportunity to test it in all types of rain, whether light, medium and heavy... Result? Not a drop got in because it was dry everywhere. In conclusion, I recommend this backpack to anyone who wants to relax on rainy days, especially if you have electronic components (e.g. laptop, charger, smartphone, etc.) inside. Honestly, I would feel safer going out with a backpack like this, especially now that the bad season is coming, compared to a backpack that is barely water resistant and has plain fabric zippers where water gets in, which is a miracle (personal experience) For the price at which it is sold, it is really a best buy in my opinion