Hello, thank you for your interest in our product. In our "Navy Blue Basic 100% Cotton Long Sleeve Men's Shirt E6761" (ID: 925754582) model, there is **no nickel or nickel alloy** accessory (button, rivet, metal part, etc.) There is no. Our product is made entirely of cotton fabric and all details of the shirt (including buttons) consist of nickel-free materials. We understand your sensitivity and wish you to be comfortable with this issue. If you have any other questions, we will be happy to help. Best regards, Deniz Madmext Team