Very weird and I have only worn probably less than 25 times since their debut in 2014. The only Gucci shoe I am aware with a carbon fiber woven blend inside the shoe, invisible exposed carbon on the heel. These are such a rare shoe to have and is a perfect statement piece for anybody with this classic canvas GG look. THE INSIDE LOOKS NEAR PERFECT AS IF THEY WERE BRAND NEW. PLEASE DON’T HESITATE TO REACH OUT IF YOU HAVE ANY QUESTIONS.