Hydrapak
Contour™ Lumbar 1.5L:
Fits perfectly in the Octothorpe hydration sleeve to provide additional lumbar support for all day comfort. Designed to be lightweight and rugged with a slim profile to fit in smaller spaces, our innovative Contour™ Lumbar reservoir is a perfect hydration upgrade for most lumbar and hip packs. Equipped with performance features and Shape-Loc baffles to stabilize water movement, it’s ready to tackle rowdy and steep lines.
"Hydrapak reservoirs are becoming the gold standard for most hydration packs, for two good reasons: 1) they're super durable, and 2) they turn completely inside out, making cleaning and drying a breeze." -Ultrarunning Magazine
"Most importantly, though, the reservoir is nearly indestructible - you simply cannot pop the thing. We stomped on a full reservoir, threw it around the testing area/garage, and stacked 200 pounds of weight plates on it, with no visible damage. It'll probably outlive you." Active Junky