A running vest should make your run easier. Your phone, water, keys and gels are all within reach, your hands are free and you can concentrate on the miles ahead.

But if your vest starts rubbing your neck, shoulders, ribs or back, even a short run can become uncomfortable very quickly.

The good news is that chafing doesn't always mean you need a different vest. Very often, the problem is the fit, the position of the straps or the way the weight is being carried.

So, why does a running vest chafe  and what can you do about it? Here are seven things to check before your next run.

1. Your Running Vest Is Too Loose

One of the most common causes of chafing is movement.

If a vest is bouncing or sliding from side to side with every stride, the fabric and straps repeatedly move against the same areas of skin. Over a few miles, that small amount of movement can turn into rubbing.

A running vest should feel snug against your body without restricting your breathing.

Put the vest on with the kit you normally carry, tighten it gradually and then jog on the spot. If you can feel the vest moving independently of your body, it probably needs adjusting.

2. Check the Position of Your Chest Straps

Chest straps are not simply there to make the vest tighter. Their position matters too.

Everyone's torso is different, so a fixed strap position that feels comfortable for one runner can sit awkwardly on another.

If your vest allows the chest straps to move vertically, experiment with moving them higher or lower rather than simply pulling them tighter.

The Swiftal Running Vest uses vertically adjustable chest straps, so you can position them where they sit most comfortably on your body and then adjust the tension separately.

3. Don't Overtighten the Chest to Stop Bounce

When a vest moves, the natural reaction is often to pull the chest straps as tight as possible.

That can stop some movement, but it can also create pressure across the chest and pull the vest into an uncomfortable position.

A better approach is to use all of the adjustment points available.

On the Swiftal vest, the waist can be tightened independently of the chest. This helps secure the vest around the torso without relying entirely on the chest straps.

You want secure, not squeezed. You should still be able to take a full, comfortable breath.

4. If It Rubs Your Neck, Check How High the Vest Is Sitting

Neck rubbing is particularly frustrating because once the skin becomes irritated, you tend to notice it with every step.

If the top of the vest is sitting too close to your neck, don't automatically tighten the chest straps further. That can sometimes pull the vest even higher.

Try loosening or repositioning the chest straps and using the waist adjustment to secure the vest lower around your torso.

Then move your arms through a normal running motion. The shoulder area should feel secure without the edge of the vest continually touching or rubbing your neck.

5. Distribute the Weight Evenly

Sometimes the problem isn't the vest itself - it's what's inside it.

A full 500ml flask on one side, a phone and several gels on the other, plus something loose in the rear compartment can make a vest move differently as you run.

Try to keep the load reasonably balanced from left to right and make sure heavier items are held securely rather than bouncing around.

If you're using two soft flasks, carrying one on each side naturally helps balance the front of the vest. If you're only carrying one, check that the rest of your kit isn't creating too much weight on the opposite side.

6. Think About What You're Wearing Underneath

Your running top can make a difference too.

Seams, loose fabric and damp material can all create additional friction between your skin and the vest.

On longer runs, a technical running top that fits comfortably beneath the vest will generally be a better choice than loose cotton clothing that becomes heavy when wet.

If you know you have a particular problem area, an anti-chafing product can also provide extra protection, particularly on longer runs or in warm weather.

7. Do a 30-Second Bounce Test Before You Leave

This is probably the simplest tip of all.

Load your vest exactly as you intend to wear it, put it on and spend 30 seconds jogging or gently bouncing on the spot.

Pay attention to three things: does the vest move up and down, does it slide from side to side, and can you feel any strap or edge repeatedly touching the same part of your body?

If something doesn't feel right in your kitchen or hallway, it's unlikely to improve after five miles.

Make the small adjustment before you leave.

How Should a Running Vest Actually Fit?

A well-fitting running vest should feel close to the body and move with you rather than against you.

It shouldn't bounce when you run, but it also shouldn't feel restrictive. You should be able to breathe deeply, move your arms naturally and access your phone, water and gels without having to fight with the vest.

The best fit isn't necessarily achieved by making every strap as tight as possible. It's about finding the right combination of strap position and tension for your body.

Why Adjustability Matters

Runners come in different heights, chest sizes, torso lengths and body shapes. That's why adjustability is so important.

The Swiftal Running Vest has chest straps that move vertically as well as tightening and loosening, together with an independently adjustable waist. That gives you more control over where the vest sits and how securely it is held against your body.

Rather than relying on a fixed strap position, you can make small changes until the vest feels right for you.

How to Adjust Your Swiftal Running Vest

1.         Start loose. Put the vest on wearing the clothes you normally run in.

2.     Adjust the waist. Tighten the wasit until the vest sits securely against your torso but doesn't restrict breathing. 

3.         Position the chest straps. Move them up or down until they sit comfortably, then tighten them enough to secure the front of the vest without restricting your breathing.

4.         Load it first. Add your usual phone, water, gels and other essentials before making the final adjustment.

5.         Jog on the spot. Do the 30-second test and make small adjustments if you feel movement or rubbing.

6.         Recheck during your first run. If you notice a pressure point, stop and make a small adjustment rather than waiting for it to turn into chafing.

7. Still unsure? Watch this short video. 

What If Your Running Vest Still Chafes?

If you've tried adjusting the vest and it still rubs, don't simply put up with it.

Sometimes a particular design just doesn't suit a particular body shape. Comfort matters, especially when you're wearing a vest for longer training runs, half marathons or marathon preparation.

Swiftal offers a 30-day fit guarantee, so you can try the vest on real runs and make sure you can achieve a comfortable fit.

And if you're struggling to get the adjustment right, get in touch with us. We're always happy to help with fitting advice.

The Bottom Line

A running vest shouldn't be something you spend your whole run thinking about.

If it's rubbing, bouncing or riding up, check the fit before assuming the vest isn't for you. Small changes to the chest strap position, waist tension and weight distribution can make a big difference.

Once it's adjusted properly, a good running vest should simply sit there and do its job - carrying your water, phone, keys and fuel while you get on with your run.