What's the Best Insole for Flat Feet? A Guide to Top OTC Insoles

Flat feet come in various types—some rigid, some flexible, some in between. The most problematic are the truly flat. These feet lack arch support which can lead to overpronation (when the foot rolls inward), resulting in ankle, knee, and back pain. Flat-footed individuals may tire easily, develop calluses or bunions, and struggle to find comfortable footwear.

Interesting fact: Many people with flat feet do not realize it’s contributing to their discomfort, assuming foot fatigue is just “part of life.”

For flat, flexible feet, Tony stresses two main needs: even weight distribution and stabilizing the heel and ankle. Without an arch, excessive pressure gets placed on certain parts of the foot, leading to discomfort and potential joint problems. A good insert for flat feet aims to:

• Re-distribute weight evenly across the foot
• Correct alignment issues stemming from the lack of structure
• Add cushioning where it’s needed most, especially in the forefoot and heel

This is a standout favorite. While part of the “medium arch height” family, it offers robust support, hitting all four foot arches and incorporating a metatarsal pad for forefoot comfort. For flat feet that can tolerate a bit more structure, this insert can really help guide the foot toward proper alignment and even pressure distribution.

This gives the most corrective power over-the-counter inserts can offer.

A more moderate arch contour means it won’t push up into the medial arch as much as stronger inserts. With a plastic core and good cushioning, it’s ideal for flat, flexible feet that are sensitive to “too much” support.

It is ideal for feet where arch support can feel uncomfortable.

This insert stands out for its shock-absorbing properties—thanks to an open-cell polyurethane “Poron” foam in the forefoot area. Its arch support falls into the medium-low category, paired with a flexible design.

This is perfect for runners, warehouse workers, or anyone standing all day and needing both mild arch support and maximum forefoot cushioning.

Although this features a “medium to medium-high” medial arch, its ribbed, flexible core means it adapts well to flat feet without feeling stiff or uncomfortable. It presents the “bounciest feeling” among the options, giving energy return in the heel, arch, and forefoot.

This has a blend of flexibility and support at a competitive price, which makes it a smart pick for all-day comfort.

Sometimes minimalism is best, especially for dress or casual shoes. The Pedag Holiday Insert features a low arch contour, a soft plastic core, and a built-in metatarsal pad, making it unobtrusive while still offering basic support.

This is for those who need a thinner insert that still provides gentle structural help.

Not all flat feet are created equal, and not all inserts work for every person. The key is testing different styles for the right balance of support, flexibility, and cushioning based on your sensitivity and daily needs. 

With the wealth of quality OTC inserts, most people can find substantial relief from pain and fatigue related to flat feet. And as always, consult with a knowledgeable shoe professional (like us!) for personalized guidance.

https://www.apma.org/flatfoot

https://www.mayoclinic.org/diseases-conditions/flatfeet

https://medlineplus.gov/ency/article/001262.htm