The traditional Interpod Flex is the closest option available in comparison to custom-made orthoses and is made from durable polypropylene. It is available in 3 arch heights and each pair comes with two pairs of top covers - a ¾ length pair and a full length pair.
| Size UK | Size EU | Code |
| 3-4 | 37-38 | SC3021 |
| 5-6 | 39-40 | SC3022 |
| 7-8 | 41-42 | SC3023 |
| 9-10 | 43-44 | SC3024 |
| 11-12 | 45-46 | SC3025 |