Best Arch Inserts for Flat Feet: Support That Strengthens

The best insoles for flat feet

Your arches make your gait more flexible, improve balance when moving or standing, and absorb shocks. If your arches are not properly raised, your feet will appear flat and so your mobility and flexibility will be impaired. This can result in a strain on joints and cause pain that needs to be addressed with arch support.

Flat feet don’t just affect the foot—they can impact your entire body’s alignment. That’s why finding the best arch inserts for flat feet isn’t just about comfort, it’s about protecting your posture, reducing pain, and improving long-term mobility.

What causes flat feet?

We all have flat feet when we’re born—the arches generally develop as we grow.

Sometimes that doesn’t happen because our feet don’t grow properly. This is often a genetic condition, meaning that many in the same family will have flat feet.

In some cases, flat feet develop later in life. This condition is commonly known as fallen arches or acquired flat feet and can be caused by:

• The natural ageing process as tendons stretch
  

• Obesity or weight gain, possibly due to pregnancy
  

• A traumatic injury, such as tearing a tendon or dislocating bones
  

• Inflammation in the joints caused by rheumatoid arthritis
  

• Decreased blood supply to the feet
  

• Diabetes that affects the nerves or weakens tendons
  

Flat feet can lead to tired legs, swollen ankles, poor posture, foot pain, and discomfort that radiates into the knees, hips and back. 

They can also result in an excessive rolling inward of the foot (overpronation) and make you place your feet on the ground incorrectly, which can make existing hip and knee pains worse and generally inhibit your movements. You can gain some relief by applying ice packs, undergoing surgery to repair tendons, losing weight and practising various exercises to stretch and strengthen tendons and muscles.

There are 2 types of flat feet:

• rigid flat feet are always flat whether you put weight on them or not

• flexible flat feet have an arch when there is no weight put on them, but become flat when you stand.

Why Flat Feet Need More Than Just Cushioning

Most mass-produced shoes are built for average feet. But there’s no such thing as an average arch.

When flat-footed individuals wear generic shoes or inserts, the lack of structural support can make things worse. Foam or gel-based insoles may feel soft, but they don’t provide the correction or strength-building needed to fix underlying issues.

What your feet really need is a solution that:

• Supports proper alignment
  

• Restores natural motion
  

• Encourages muscle activation
  

• Improves proprioception and blood flow
  

That’s why true performance-focused arch inserts are essential—not just for comfort, but for long-term foot health and injury prevention.

How G8 Performance Inserts Help Flat Feet

At G8 Performance, we engineered the Pro Series 2620 Insoles to address the root causes of foot dysfunction. These aren’t quick fixes. They’re fully customisable arch inserts that support and strengthen the foot over time—making them some of the best arch inserts for flat feet on the market.

Here’s how they work:

✓ Adjustable Arch Support

With 5 arch heights and 11 placement options, you can tailor the insole to your exact foot shape. This means better comfort, alignment, and long-term adaptability as your feet grow stronger.

✓ Dynamic Arch Piece

The 2620 features a flexible arch system that moves with your foot. It compresses under load, springs back into shape, and supports the plantar region through every phase of your gait.

✓ Encourages Forefoot Flexion

By supporting the forefoot, the insert helps disperse energy at impact. This reduces pressure on the heels and promotes efficient forward movement — ideal for walking, running or cycling.

✓ Increased Blood Flow and Proprioception

Stimulating the front third of the foot—where most of the nerves and blood vessels are—helps reduce numbness, improve balance, and support the healing of overuse injuries.

✓ Long-Term Strength Building

Instead of over-supporting the foot and making it passive, the 2620 lets your muscles work—strengthening the arch and improving foot mechanics over time.

Explore the full features of the 2620 insole

Strengthen Your Feet, Improve Your Performance

When feet aren’t functioning well, the rest of the body has to compensate. That’s why foot dysfunction can lead to hip misalignment, knee strain, back pain, and reduced movement efficiency.

The best arch inserts for flat feet don’t just treat symptoms. They improve the way your foot functions — which improves how your entire body moves.

By choosing the G8 2620s for flat feet, users have reported:

• Foot pain relief and improved posture
  

• Less swelling and strain in ankles and knees
  

• Reduced numbness and hot spots
  

• Better endurance and agility

• Fewer injuries and longer time on their feet
  

FAQs about Flat Feet and Arch Inserts

Are flat feet really a problem?
They can be. While some people never experience symptoms, flat feet can reduce efficiency, increase fatigue, and cause alignment issues throughout the body.

Can arch inserts fix flat feet?
Not always, but they can dramatically reduce symptoms and improve function. Inserts like the G8 2620 insoles help strengthen the foot, encouraging a more natural and efficient movement pattern.

Should I wear arch support every day?
Yes—especially in your day-to-day shoes. The more consistently you use supportive inserts, the more benefits you’ll experience in terms of comfort, posture, and muscle conditioning.

Are G8 insoles good for cycling or running?
Absolutely. The G8 2620 was originally designed for performance in technical shoes like cycling cleats and endurance footwear. Their low-profile yet powerful support makes them ideal for athletes.

Try the Arch Inserts That Do More Than Support

If you’ve been searching for the best arch inserts for flat feet, the G8 Performance 2620s offer a complete solution: customisable, performance-focused support that helps your feet get stronger over time.

Whether you’re managing discomfort, preventing injury, or simply trying to move better—your feet deserve more than mass-produced foam.

Shop the Pro Series 2620 now and take your next step with confidence.