Which insoles actually help, how much they cost, and what the NHS prescribes — so you can choose the right pair without wasting money.
Try prefabricated insoles first. Custom orthotics are only recommended if off-the-shelf options have not helped after a proper trial period.
According to Algeos and NHS procurement data, Slimflex is the most widely prescribed prefabricated insole in the NHS. Studies show prefabricated insoles can be as effective as custom devices in many cases.
| Type | What It Does | Cost Range | NHS Available |
|---|---|---|---|
| Gel heel cup | Cushions the heel and absorbs shock at heel strike. | £5–15 | Yes (pharmacies) |
| Arch support insole (3/4 length) | Supports the arch and reduces pronation. | £10–30 | Yes |
| Full-length orthotic insole | Full foot support and alignment. | £15–40 | Yes |
| Custom orthotics | Moulded to your individual foot shape and gait. | £150–400 | Limited via NHS |
| Night splints | Maintain a gentle stretch on the fascia during sleep. | £15–40 | Available |
The NHS typically replaces orthotics at a rate of 2–4 pairs per year, depending on the Trust and clinical need.
Match the insole to your foot type and where the pain is worst.
Firm arch support insole with medial posting.
Cushioned insole with lateral support.
Deep heel cup with cushioning.
Full-length insole with arch support.
Use your insoles in work, casual and home shoes — not just your trainers. The fascia is loaded every step.
Expect a few days of initial firmness. Build up wear over 3–5 days rather than wearing them for a full day immediately.
Insoles lose effectiveness after 6–12 months of daily use. The cushioning compresses long before the cover looks damaged.
Insoles support recovery but are not a replacement for the stretching exercise programme.