Crep Protect Foam X Sneaker Cleaner Foam: Effortlessly Lifts Dirt for cleaning shoes.
Dirt is removed as the colour of the foam applied changes from purple to white.

Simply pump up the bottle, apply, leave the foam on for around 5 minutes and wait for it to change from purple to white, then wipe off with a damp microfibre cloth.
If dirt persists, repeat the process.

For leather, canvas or nylon.