This is a coating agent specifically designed to prevent metal allergies. It can be applied to accessories. Unused and unopened after purchase. - Brand: Suffix Co.Ltd. - Product Name: Sweat Barrier - Contents: 10g - Application: Jewelry protectant Suffix Sweat Barrier Please refer to the following: Jewelry Protect is for preventing metal discoloration, and Sweat Barrier is a fluorine coating agent specifically for preventing metal allergies. It is possible to use them simultaneously.