HydraPak Velocity IT (1.5L or 2L Hydration Reservoir) - Insulated Water Bladder/Reservoir for Hydration Pack – Self-Sealing Bite Valve, Leak Proof and Dishwasher Safe

Great for hot or cold days for the water to stay cold or not freeze. The size is great for long runs. The bite valve could be more durable so I need that replaced every once and a while so it doesn't leak. The taste of the water is good.This product functions as intended and is a good quality for the price, especially with the warranty.

Our standard packs/tubes ALWAYS froze. Very surprised how this performs in CO weather, one spike-hike we did was around +1 degrees. We put room temp water into them and no frozen teeth and really didn't get too cold at all. We also used this recently on a day time hike where the temp was nearly 90. Put cool water in there and stayed cool over +9 miles.

I picked this up to fit in my Salomon vest. I liked the idea of this one better than the Salomon brand because of its insulated properties. It fit in my vest perfectly, but the best part is it kept my water ice cold for hours.I filled it up at 0500 in the morning for a 15 mile trail race. By the start of the race at 0700 it was already 80 degrees out with 90% humidity. I drank from my Solomon flasks first, but by 1000 I was hitting the bladder. I fully expected it to be warm, especially since it was against my back through the vest. But that water was still ICE COLD after hours and being against my hot back.Couldn't be happier with the purchase. I highly recommend this bladder.

The twist to lock/unlock valve is pure crap. They have a newer valve design now that most of the other bladders come with but not this one. Due to this sad oversight, I had to pay an extra $9 to get a decent valve.

Works great. Added cold water and ice before 9 mile hike and water stayed cold; even with bladder against my hot back all day.

Quality seal

Just completed a 7,300+ mile motorcycle trip and used this water bladder in my tank bag every day. Normally filled it with cold water the night before and placed the bag in the hotel refrigerator. The bag kept the water cold for hours and at least cool through a hot afternoon. After taking a few sips I hold the hose up in the air before closing the bite valve to allow water in the hose to drain bag into the bag. This left only an inch or so of water to be heated on a hot day. This way my next first sip was cool to warm but never hot. Durability is good and the bag is easy to clean. I found this an excellent product for this application.

My Nathan VaporAir came with a non-insulated bladder, which simply doesn’t cut it in the Texas heat or on day-long hikes in warm weather. I got a Nathan insulated reservoir, which was atrocious: nasty chemical taste that wouldn’t go away after many washes and soaks in baking soda; a terrible design meant to minimize sloshing (a non-existent issue if you fill your reservoir properly) but which made the reservoir very difficult to slide into the hydration vest; and a lining too rigid to pull the reservoir inside-out for cleaning.The Hydrapak bladder solves all those problems. The bladder keeps my water appropriately cool over an entire day in mild weather (although you’ll want to slide an ice pack between the bladder and your body on warm and hot days); it is fully reversible for cleaning; and I did not experience any chemical taste after the first use (I’d filled it with a baking-soda solution prior to first use as well).It pairs very well with the HydraFusion Insulated Tube, which actually kept my water much colder than the reservoir itself in mild weather (due to not being in contact with my body heat).My only wish would be for the reservoir to be slightly bigger. It hasn’t been an issue yet, but my original bladder was 1.8L, then 1.6L for the Nathan insulated bladder, and this one only 1.5L. It should be possible to design a 2L bladder that fits most hydration vests.