Product Description
You're deep into a long ride or trail run, juggling a bottle of water and another of electrolyte mix, and there's no way to adjust that ratio once you're moving. Too strong, and your stomach turns on you. Too weak, and you're not getting the sodium you need before the cramps start.
The Flexx Hydration System is the dual-reservoir pack built to let you dial in that ratio mid-effort, with the twist of a single mount.
One Dial, Two Reservoirs
Water lives in one reservoir, your mix lives in the other, and the Mix Dial on your shoulder strap blends the two in seconds. No stopping, no swapping bottles, no guessing.
Fits the Pack You Already Own
The included Universal Dial Mount works with virtually any pack that has a hydration compartment, so you don't need to replace your favorite vest to get this. It comes in 1.5-liter and 2.5-liter sizes, from lightweight vests up to standard and large packs.
Built to Actually Stay Clean
Both reservoirs are fully reversible and top-rack dishwasher safe, and the Mix Dial disengages for a quick rinse. No mold, no residue, no scrubbing a reservoir you can't fully open.
The Mix Dial works like a valve, not a blender. Turning it changes how much flow comes from each reservoir before the two lines meet at your mouthpiece, so you're adjusting the ratio in real time instead of locking in one concentration before you leave the house. That matters because your sodium and carbohydrate needs shift with heat, altitude, and effort, and a pre-mixed bottle can't adjust to any of that.
Fill both reservoirs: Water in the primary reservoir, your mix in the second.
Mount the dial: Clip the Mix Dial onto your shoulder strap with the Universal Dial Mount.
Adjust as you go: Turn the dial toward water or mix as effort or conditions change, no need to stop.
This isn't just a hydration pack. It's the difference between guessing at your mix and actually dialing it in.
For gear that arrives damaged or falls under the manufacturer's warranty: Please send a photo of the damage or error message to hello@thefeed.com. We will either help process a claim for the product and a replacement product or store credit will be provided, or we will direct you towards the correct place to make a warranty claim for the product. For returns on gear that you have used, we follow the manufacturer's instructions for satisfaction guarantees. This is specific to each gear product, terms and conditions may change.