The bag is made with high-quality materials, and the zippers have worked well all the time. I've been using it for 3 years. It has two main problems: 1) The side pocket: if you have a slightly larger bottle, it doesn’t fit. If the backpack is already full, it’s impossible to put anything else in that pocket. 2) I’m not sure if others have the same issue, but I can’t use the backpack for more than 15 minutes without my back getting completely sweaty. I’ve never had this problem with other backpacks, but with this one, it’s impossible to avoid. I don’t know if it’s due to the materials or the design, but I always end up with a very sweaty back.
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