Authentic. OP$225(ca). Size: model 165cm, 55kg, 37EU and feeling bit small. I’d buy new ones for bigger size. Extremely comfortable by trying. Different from cheap and non luxury brand shoes. Not sure what technology, but love it! Recommend people who usually wear 35 36 or maximum 36.5. Not fit for 37 Recommendation: old money vibes. Brown is better than black in reality . Conduction: brand new. Ship without box is cheaper. I don’t sell cheap and useless product. All products are self-used. I’m a high standard and very clean person, no smoking. ONLY make you spend 1 dollar and looks like 10 dollars expensive. All are brand new or 99% new. Unless otherwise indicated. Preferably no negotiation, thanks for the trust and you’d be surprised and delighted of what you’ll get