Finding the right running insoles can significantly improve comfort and stability for flat feet. This guide highlights five well-regarded options available on Amazon UK, focusing on arch support, shock absorption, and fit. Each product section explains who it’s best for, key features, and practical considerations to help you choose the right insoles for running, walking or daily wear.
| Product | Brand | URL |
|---|---|---|
| iFitna Plantar Fasciitis Arch Support Insoles | iFitna | https://www.amazon.co.uk/dp/B0892C6N9S?tag=bestbuyradar-21 |
| Dr. Scholl’s Run Shock Absorbing Insoles | Dr. Scholl’s | https://www.amazon.co.uk/dp/B0DQCJT3V4?tag=bestbuyradar-21 |
| VALsole Orthotic Insole Arch Support | VALSOLE | https://www.amazon.co.uk/dp/B09FXRBW8P?tag=bestbuyradar-21 |
| KIAMXNE Orthotic Insole Arch Support | KIAMXNE | https://www.amazon.co.uk/dp/B0CQT5DD6S?tag=bestbuyradar-21 |
| GR8ful Orthotic Insoles 3/4 Length | gr8ful | https://www.amazon.co.uk/dp/B07LH1B3S1?tag=bestbuyradar-21 |
iFitna Arch Support Insoles

These insoles combine dual-layer EVA foam and PU cushioning to deliver targeted support and cushioning for running and jumping activities. They are designed to relieve pressure and provide a soft, supportive feel, making them suitable for flat feet seeking consistent arch support. Breathable fabric helps keep feet cool and dry during workouts. Note that it’s recommended not to double-stack insoles in the same shoe, as this can create excessive bulk and discomfort until the user adapts to the arch support.
Dr. Scholl’s Run Shock Absorbing Insoles

Designed to relieve pain from common running injuries, these insoles feature a 3-zone heel-to-toe design and a deep heel cup to absorb impact with every stride. They’re intended to reduce shock and enhance stability during prolonged activity. Reinforced arch support improves weight transfer from landing to push-off, contributing to better overall foot alignment and reduced strain during intense exercise.
VALsole Arch Support Insole

The cork arch support, deep heel cradle and metatarsal pads work together to correct excessive pronation and support flat feet. The design aims to distribute pressure across the foot and maintain stability, helping to alleviate foot fatigue during long runs or day-to-day activities. Suitable for men and women, the insoles emphasize a balance of arch height and flexible support for varied foot shapes.
KIAMXNE Orthotic Insole

This trimable insole offers guidance for size selection and a gradual adaptation plan to avoid discomfort. It emphasizes three-part arch support, a deep heel cup, and metatarsal relief to help with over-pronation and flat feet. The kit includes straightforward trimming guidance so users can tailor the fit to their footwear, improving overall alignment and comfort during running and walking.
GR8ful Orthotic Insole

GR8ful insoles focus on plantar fasciitis and flat feet with 3/4 length to fit into most athletic footwear without crowding the toe area. They provide shock-absorbing support and an emphasis on arch stabilization to help reduce heel and lower limb discomfort. The design aims to offer reliable foot alignment during daily activity and sports, while remaining easy to transfer between shoes.
Buying Guide
Key considerations when selecting running insoles for flat feet:
- Arch support level: Look for insoles with pronounced arch support and a deep heel cup to stabilize the foot during impact.
- Shock absorption: Materials such as EVA foam, PU cushioning or advanced Poron-based systems can reduce impact on heels and arches.
- Foot pronation control: Insoles that address over-pronation help align the ankle, knee, and hip, potentially reducing pain in joints up the kinetic chain.
- Insole length and trimability: 3/4 length insoles fit more shoes, but ensure they still provide adequate heel and arch support. Trim-to-fit options offer customization for a precise fit.
- Breathability and comfort: A breathable upper fabric helps manage moisture and odour during long runs or daily wear.
- Compatibility with footwear: Consider activity type (running, walking, hiking) and shoe volume to avoid crowding or decreased shoe fit.
- Usage pattern: New insoles typically require an adaptation period. Start with a few hours per day and gradually increase wear time to minimize discomfort.
- Maintenance: Removable insoles are easier to clean and replace as they wear out.
When evaluating options, balance arch support with fit. People with flat feet may benefit from a moderately rigid arch that maintains alignment, whereas those with sensitive arches might prefer softer cushioning with targeted support. Manufacturing materials and design features vary, so consider trial periods where possible and consult a podiatrist if persistent pain occurs during use.