Buy Cheap Camelbak Thermal Control Kit 
Buy Low Price From Here Now Converts your CamelBak for extreme conditions to avoid freezing in the winter and heating in the summer. Includes standard Bite Valve mouthpiece, Bite Valve cover, insulated tube cover and 46-inch delivery tube.
Product Features- Country of origin: Mexico
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- Keeps water cool in summer and doesn't freeze in winter.
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"Not As Advertised" 2010-01-02
By S. Cooley
This product does freeze up, even when the temps are in the teens and low 20s. Based on their advertising, this shouldn't happen. Since the only way to keep the hose from freezing up is to constantly blow out the hose, you might as well just use the hose that came with the original bladder.
I ski in Colorado, and frequently this thing freezes up. It was money NOT well spent, for sure. The ad states it is for use in extreme winter conditions. I wonder what "extreme" means; certainly, any temperature below 32 degrees is not extreme, yet the hose will freeze in mildly freezing conditions. When skiing, the last thing I want to have to think about is whether I will be able to hydrate when I want to. Just a pitiful product.
"Insulation is Needed" 2009-12-16
By Danno119
Purchasing the Thermal Kit helps keep all of my water at the same temp, no more warm water in the tube after first use. Worth the money if used in both hot and cold weather. Prevents water from freezing if used in cold weather, like winters in Wisconsin. Protective bit valve is nice to have and keeps dirt out of valve.
"Cold in Summer, not frozen in Winter." 2009-09-29
By bblhed (New England)
I have this tube kit and I use it year round. It keeps the water liquid in winter, and cooler in summer. An added bonus is that it also protects the tube and bite valve. An added plus is that it is all black so it camouflages the tube a bit if you need or are into that kind of thing.
Someone mentioned that they had problems taking the tube on and off their bladder for cleaning. I used to have that problem too, but I now follow camelbak's instructions and I use hot water whenever I take the tube off or put it on, it is a huge help! Just run hot water over the joint you are trying to disassemble for about a minute and presto it just slides apart.
"Got mine for the Summer!" 2009-08-19
By twoyellowlabs (Overland Park, KS USA)
Two things make this a great add on accessory for the summer: 1) Included is a Big Bite Valve cover. 2) The thermal control works great in the heat.
I use mine primarily for XC MTB riding and picked one up for my new Mule N.V. just in time for a 90+ degree day ride on the River Trail in Lawrence, KS. My drink was nice and cold from the start every time. Compare that to my buddy with his standard issue Camelbak Mule. He had to suck out an entire mouthful and spit it out before he could get to the "cold stuff." Sure he could have blown the "warm stuff" back in and then started, but who wants to do that? The valve cover also managed to keep the dirt and grit off the Bite Valve and not leak all day including the ride to and from in the car.
One recommendation is to use the kit as is vs. taking the thermal cover off the new tube and adding it to the existing one already attached to your pack. Not sure what made me think it would be easier than following the directions, but it is doable if you prefer a tad shorter drink tube. I'm also considering the Filter Adapter Kit only for the convenience of having a quick connect as taking the tube on and off the bladder for cleaning is a royal pain.
"Gotta have one in the winter" 2007-11-25
By Michael Dunkle (Rollinsville, Colorado, USA)
If you play in the snow and ice...you need one of these. For ~$12 it's hard to pass up. While there is no hydration system that does not have issues of freezing up (I don't care if you keep a nalgene buried deep in your pack surrounded by hot packs - eventually it will freeze up), this is a great first line of defense. I'm on a mountain search and rescue team and got this for winter/avalanche season.
One tip...try blowing the water in the tube back into the reservoir after you drink...keeping the bite valve free of water (and thereby water to freeze) will help a lot.
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