Review on Optimized for SEO: Iron Flex Cap from Black Clover by Darryl Blumenthal

Not really a fault with the product but I have to point this out as I sent the cap back; A label was attached to the cap indicating the size (s/m) of the cap. The sticker was difficult to remove and once removed left a dark circle of adhesive residue on the visor of a white cap (see photo). I tried wiping it down with hot water/cloth but it wouldn't come off. I wanted to try Goo Gone but I was afraid it would stain the hat so I decided to return it. If you are using a high tack sticker, I recommend applying the sticker to the bottom of the bill. Or find a new sticker supplier.