Mazama 1.5 Liter Replacement Lumbar Pack Hydration Reservoir Water Bladder for Day Pack Run, Bike, Hike, Moto | Dimensions are 9.7 inches by 12 inches

Bought this as a replacement for me EVOC bike pack. It is a little large for the pack, but definitely fits when full. This is way better than the $50 bladder brand name. I also had a recent bladder replacement for my camelbak and the restricted water flow when you are breathing hard is horrible.

I HIGHLY RECOMMEND this quality hydrobladder! It far exceeded my expectations. Besides sealing watertight with the flick of two small levers, the quick connect/disconnect attachment on one end of the hose and on the connection on the bladder work flawlessly. The mouthpiece valve is also very easy to use. This replacement bladder also came with two-piece magnetic hose holder. One piece has a metal disc which clips on a strap. The other end....the end next to the mouthpiece contains a small magnet. EXCELLENT purchase! This bladder fits into my 50 oz waist Hydrobak just fine.

My go-to water pack for cross country skiing is an ancient MSR lumbar pack. The original bladder sprung a leak about 3 years ago. After considerable searching, I found a Camelback 1.5L bladder but the problem with that is that the drain hole into the drinking tube is on the side of the bladder. It would be fine if the bladder sat vertically in the pack but it doesn't so when the bladder gets low, it's more difficult to get the water out. Plus, the screw on top began to leak and it's harder to clean. This Mazama pack is perfect. And it so happens that I was cross country skiing in Mazama, WA! Seems this pack was meant to be for me!

Needed a replacement bladder as I sprung a leak in my original one. This one is working well and was a good price.

Purchased this because I needed a replacement bladder for a used REI hydration pack I purchased. It required a 1.5L Compact Lumbar bladder but it was impossible to purchase just the bladder from the store. Found some versions online for over $35 dollars but I decided to try my luck with this much more reasonably priced product. So far so good. It holds the water well, no leaks. It's slightly bigger than the the original bladder designed for my pack due to the way the top plastic opens to fill, but I still managed to fit it in its compartment.

By far one of the best bladder sealing mechanisms I've seen. Move two latches, open... fill... Close latches... DONE! No leaks with it so far, fits my lumbar pouch perfectly. Stayed nice and cool all day long.

Absolutely the worst bladder I have ever used. The first one I tried it last one ride and it started leaking around the seal. Decided I would get another to see if I got a lemon. Once again after one more ride this one got a small pinhole in the bladder. If you are using this for dirtbike racing stay away, it definitely does not hold up.

So far it's holding up great. It's been on a handful of hikes now. It does seem a little thinner than expected, like a 5 times ziplock bag. But that doesn't seem to affect the durability the mouthpiece and port for the tube are perfect and the top closure is very well designed!