Rated4out of5byDiamond Head ZachfromWorth itI haven't used this in freezing temperatures so I can't speak to such use. My use has been in hot, dusty, and the sandy environments of Southern California on day hikes and training at the beach. Generally speaking, at some point, you're going to take your pack off and when you do that you can save yourself a few minutes of cleaning by keeping the bite valve covered. I also found that it's an excellent improvement in keeping your water cold - which in high temperatures is quite wicked. I suppose my one complaint is that I've yet to really try to take off the tubing to insure that there is no algae accumulation and it takes a little extra work to feed it through the pack (I use it with a Kestrel 48).
Date published: 2012-12-01
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