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Fanny packs got small and got renamed. This MyCarbon running belt carries phone and keys — and hides a deployable water bottle sleeve.
I bought a MyCarbon running/activity belt with a carbon-fiber-look nylon weave. Light, wide adjustable webbing, reflective loops, breathable mesh against the body, a security pocket, main zip pocket with neon lining and a headphone pass-through. The clever bit is an outer pocket that unzips into a water-bottle holder with reversible elastic straps. The button goes to the belt on Amazon.
- Deployable bottle holder is genuinely clever
- Reflective and neon bits for road visibility
- Security pocket + key clip
- Breathable mesh on the body side
- Useful for hikes and yard work, not only running
- Hip pad is a flap, not thick cushioning
- Bottle sleeve adds bulk when packed with a full bottle
▶ Watch the full review on YouTube
Belt layout
Carbon-look nylon, lighter than I expected. Inch-and-a-half webbing, stout buckle, reflective adjustable loops for a wide size range. Inside: breathable mesh and a security pocket for ID/cards. Main pocket has neon/reflective lining, a mesh divider, room for phone and keys, a sewn lanyard clip and a headphone loop.

The hidden bottle holder
Outer pocket unzips into a water-bottle sleeve. Elastic straps are sewn in the middle so you can bias the bottle for a left- or right-hand grab. Fits a normal-sized bottle.

Verdict
Impressed — phone, keys, cards, and water when you need it.
FAQ
Does it hold a water bottle?
Yes. An outer pocket unzips into a bottle sleeve.
Left- or right-hand grab?
Elastic straps can bias either side.
Just for running?
I also like it for day hikes, walking and yard work.
Reflective?
Yes — loops and neon lining accents.
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