I have this product in the 2 liter size, since I Carry two 750ml MSR bottles. I can move this bag freely without being afraid of tearing it. The Hyperflow filter includes a cap which fits directly onto this bladder so I can filter water into it. There is an additional flow/no flow valve before the actual bite valve which is nice to have. Plus, it looks great! Highly recommend this product.
I have the 3L bag. I was debating on the 2.5 and 3L bags, but figured the extra half liter might come in handy for some isolated hikes. The material is very durable and fits great in my backpack. The hose has a bite valve (similar to a CamelBak) which makes it easy to drink while hiking. My only complaint was that my backpack has a center clip holder, so I had to use a zip tie to evenly hold it in my pack. Another reason I like the 3L is that I usually fill it up in the morning and it lasts me all day. It can be a pain to fill it up in the middle of the day since you have to unpack your backpack to get it in and out. I have the MSR Microfilter and it attaches to it. I highly recommend this to anyone looking for a good hydration system!
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