Review on KUYOU Hydration Rucksack Backpack Climbing by Adam French

I've used the pack for a couple of long runs and have already come back with a wet back. My back was soaked with more than sweat. The backpack leaks and does not help walking (which seems to compound the problem). Leaks so bad the water runs down and I can feel it on my shoe/ankle when I walk. The problem is not so serious if the water bladder is filled with less than 1 liter. I had to put my phone in a zippered pocket to keep it from getting wet from the snot in my backpack. I've been trying to figure out where the leak is coming from. I narrowed it down to a lid/hole where we pour water. I just filled it with water and shook it like it was running and saw water come out. I'm not sure if this is a problem with the item I received or if it's an endemic issue. But if it doesn't serve its main purpose, I can't give it more than 1 star. :( Other people might have better luck getting an item that doesn't leak. Leak aside, it seems to be holding up pretty well.