Mens Size Medium stone island heat reactive Printed Jacket. The heat reaction still works, ebay doesn't allow videos anymore but I have a video of it with a blow dryer. Authentic, you can scan the qr code. It's a grail for me but it's a bit small, bought it early when getting into the brand hoping I could make it work at this size, ready to move on at this point.

Transforms into a vest/gillet