Can I use these magnetic insoles with any type of shoe?

The insoles are designed in a universal size format, which makes them practical for trying in different types of everyday footwear. They are most likely to work well in shoes with a removable factory insole, such as many sneakers, work boots, or casual shoes, where you have some room to add an extra layer. To use them, simply remove the original insole and place the magnetic insole on top of the shoe's base.

For a proper fit, consider the shoe's depth. If your shoe is already a tight fit, adding the insole might make it feel cramped. It's often easier to start with a pair of shoes you find slightly roomy. Avoid using them in shoes that are extremely shallow, like some formal dress shoes or minimalist sneakers, as they could alter your foot position uncomfortably. Before cutting the insole to size (if needed), wear them for a short period in the shoe to ensure the magnet placement feels comfortable under your foot.