Storage Soles - The Secret Safe Container for Shoes | Hide Keys, Valuables, Cash and More | Hide items in Plain Sight | Great for Traveling | Fits Shoe Sizes M 8-12 W 10-14 | Trim to Fit : Clothing, Shoes & Jewelry - Amazon.com
My daughter found a secret compartment in her school shoe. : r/mildlyinteresting
Hidden Compartment in a Shoe : 8 Steps - Instructables