J23 iPhone App on Twitter: "Nike Metcon 4 XD x Whiteboard lets you write on the heel and wipe it away when you're ready to switch it up Link -> https://t.co/RTPI4UvbgY https://t.co/88KC3L5Q5Z" /
Size 5 - Nike Metcon 4 XD Chalkboard for sale online | eBay