Shoe inserts (insoles) are removable devices placed inside footwear to enhance comfort, provide cushioning, or offer arch support. Simple inserts are generally foam or gel layers for basic padding, while structured insoles and custom orthotics provide biomechanical support for specific foot conditions. Proper installation ensures the device functions as intended, distributing pressure evenly and maintaining foot alignment.
Preparing the Shoe and the Insert
The first step is removing the existing factory sock liner or insole that came with the footwear. Most athletic shoes and boots include a thin, removable liner not designed for long-term structural support. Failure to remove this original layer takes up too much vertical space, leading to an overcrowded fit. An overcrowded shoe causes discomfort, blisters, and prevents the new insert from sitting flat.
Once the old insole is out, you may need to size the new insert by trimming the toe area. Use the factory insole as a template to trace the correct shape onto the front of the new insert. Align the heel of the old insole perfectly with the heel cup of the new insert before tracing the forefoot outline. Always cut conservatively, taking off small amounts at a time, because you can remove more material but you cannot add it back. This trimming process ensures the insert matches the specific toe shape of your shoe.
Proper Seating and Alignment
With the new insert correctly sized, the next phase involves seating it properly inside the shoe, focusing on the toe and the heel. Begin by angling the insert slightly downward (30 to 40 degrees) as you slide the toe-end into the shoe. This angle helps the insert glide past the narrow throat of the shoe without getting caught or creased. Push the insert completely forward until the front edge touches the inside wall of the shoe.
Ensure the heel cup is pushed snugly and securely against the back of the shoe, where the heel counter is located. This firm seating prevents the insert from sliding backward during activity, which would displace the arch support. After positioning, run your hand along the inside of the shoe to check for any wrinkles, bunching, or curled edges. The insert must lie perfectly flat against the footbed, as any raised areas can lead to rubbing and discomfort.
Checking the Fit and Troubleshooting
After the insert is seated, perform a short walk test to confirm proper fit and function before extended use. The shoe should feel snug but not uncomfortably tight, and the insert must not shift or move while walking. If the shoe feels too tight, or if your heel slips out, the new insert may be too thick for that footwear. This issue requires selecting a lower-profile insert or using the insert in a shoe with more interior volume.
Troubleshooting Common Issues
If you notice a squeaking sound, the likely cause is friction between the underside of the insert and the shoe’s footbed. Applying a small amount of baby powder or cornstarch to the footbed before inserting the device can often eliminate this noise. For inserts that tend to slip forward or backward, a non-permanent adhesive solution can be used. Placing a small piece of double-sided tape or a dot of non-harsh glue, like Shoe Goo, beneath the heel will hold it firmly in place without causing damage to the shoe.