We Put the Waterfly Running Belt 3.0 on Two Very Different Testers and Got Two Very Different Results

Finding the perfect way to carry everything you need on a run can feel like a never-ending search. We put the Waterfly Belt 3.0 to the test to see how it stacks up to other running belts. The benefit of a big testing team is more bodies and more opinions!

Honestly, you had me at “it has pockets”. Then you double had me at the price point for all the pockets.

A good running belt can make a huge difference on longer runs and race day, giving you a place to stash your phone, keys, fuel, and even a water bottle.

I’m always searching for one that’s comfortable enough to forget I’m even wearing it. Looking at this belt it doesn’t seem like it could hold a ton, but that’s where looks are deceiving! You can load this puppy down, which makes it great for long trail days.

Waterfly Belt 3.0 Overview

The Waterfly Running Belt 3.0 is an affordable running belt designed to carry your essentials without adding bulk. It features a soft, stretchy waistband, three zippered storage pockets, water resistant fabric, reflective details, and enough room for a large smartphone, keys, cards, and a gel or two.

While Waterfly markets it as a zero bounce belt, our testing found that experience depends heavily on how you wear it, your body shape, and how much you load it. For some testers it stayed comfortably in place through the run, while others noticed movement that made it less enjoyable over longer miles.

At around $23, it’s a solid value for walkers, shorter runs, and runners who don’t need to carry much, but it won’t replace a premium running belt for everyone.

Both testers agreed on liking the look and the feel of the belt! The soft Lycra material feels smooth against your skin, and with plenty of color options, it’s easy to find one that matches your favorite running outfit.

Of course, looks only go so far. The real question is how it performs once you start running.

I’m no stranger to carrying gear on runs. Between running belts and shorts with lots of pockets, I’m used to having my phone, keys, and fuel along for the ride.

The biggest challenge for me wasn’t the fit; it was getting the belt to stay put once it was loaded up.

The Waterfly Belt uses an adjustable waistband rather than offering multiple sizes. It’s adjustable from 27 to 48 inches, which isn’t ideal, especially for runners with a larger build. And once you fill the pockets with anything more than just your phone, the fit gets even trickier.

As a curvier runner, I couldn’t find a position where the belt felt comfortable. I tried wearing it in the front, on my hip, and around my lower back.

Once I loaded it with my phone, keys, a pack of chews, and a slim water bottle, I was constantly aware of it.

Instead of forgetting about the belt and focusing on my run, I found myself adjusting it as it shifted upward or bounced up and down. 

🏃‍♂️ Ramsey’s Take: The 4-6 Mile Daily Trainer Road Test
I had a completely different experience with the Waterfly 3.0. Right out of the box, the material feels incredibly premium—almost like a soft neoprene that doesn’t scratch or chafe.

As far as size goes, it’s definitely wide, and it’s honestly the absolute max limit of what I’d feel comfortable wearing out on the road. But there’s a sweet spot between a belt that’s too small for your essentials and one that feels like a fanny pack, and this one absolutely nails it.

I dropped in my phone, AirPods case, and keys. It stayed completely locked in place from start to finish.

When it comes to running belts, I always prefer to put the heaviest item (which is usually my phone) right over my back hip bone. Positioned there, the belt was impressively secure during both easy, everyday training paces and a few higher-intensity speed intervals.

I don’t run with water so I can’t speak on it’s ability to handle something that heavy, but I’m not sure I’d feel comfortable using this belt with a waterbottle on runs specifically. I did try flipping the belt around to the front over my belly, but that was a no-go for me. It made me way too conscious of the weight, and I spent the run thinking about the belt instead of my stride. But worn on the lower back hip? It completely disappeared out of my mind.

Is it a body size issue? Not sure. I definitely don’t have curves or hips per say, but I think I’m a pretty average guy and it was an excellent choice not just for my runs, but I started using it for weekend chores around the house. Maybe you ladies have been on to something with purses for awhile??

There may also be a component of this is great for putting a few things in to run, but as you add more weight it remains great for hiking, walking, etc but then the weight causes it to move around while running. This is likely why the majority of folks who’ve purchased and rave about the belt mention it more for hikes, walks, theme park days, dog walking and cycling.

We also think the adjustable belt may be part of why it doesn’t work as well for all bodies when loaded. Coach Stacey is curvy, and a medium in most running shorts brands and found the belt needed to be almost extended fully. So that leaves less room to tighten or adjust.

Waterfly Belt 3.0 Pockets and Design

When I first saw the Waterfly Belt, I was immediately impressed by the storage. There are enough pockets that I felt like Mary Poppins; I could bring just about everything with me.

Instead of one large compartment, the belt has three separate zipper pockets in different sizes.

I really liked this setup because it kept everything organized and secure, rather than having all my gear sliding around in one pocket.

For my runs, I carried my keys, iPhone 17 Pro, a slim water bottle, and a pack of chews. That was about the belt’s limit.

I don’t think I could’ve squeezed in another pack of fuel with that setup, but if moved to a hand held running bottle, there was plenty of room for several gels, making it a solid option for longer runs or race day.

The material does have a little stretch, but I’d be hesitant to overstuff the pockets. While they handled my gear just fine, pushing them beyond their intended capacity made me a little concerned about putting extra strain on the zippers.

Sweat-Proofing & Travel Versatility

At the end of a hot run, my biggest worry with any belt is always the same: Is my sweat going to soak through and ruin my phone? The good news is that after multiple 4-to-6-mile test runs, the interior lining kept my phone completely dry. That’s a massive win, especially if you plan to carry fuel or sticky energy gels on your marathon long runs.

Overall, we think Waterfly nailed the design of this running belt.

It’s sleek, and the fun color options are a nice bonus if you like your gear to stand out. And from our weekly running polls, you absolutely love neon and bright colors, so bring it on!

One feature especially appreciated was the buckle. I know, it’s a random thing to be excited about.

But it’s incredibly low profile, lies flat against your body, and never got in the way while I was running.

It was also quick and easy to unclip. I’ve worn running belts in the past where taking them off felt like its own workout, but that wasn’t the case here.

Is this a high-quality running belt? Absolutely.

Will this be the perfect fit for every runner? Probably not.

My biggest hesitation comes down to the sizing. While the belt is adjustable, there’s only so much room to customize the fit.

If you have a curvier body, a larger build, or simply prefer a little more flexibility in sizing, I’d think twice before purchasing this one.

For runners who fall within its sizing range and can get the fit dialed in, the Waterfly Belt 3.0 offers plenty of storage, a comfortable low-profile design, and a budget-friendly price.

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