<p>Metal-plated fibers have become essential components in electronic textiles (e-textiles) owing to their excellent flexibility and electrical conductivity, with silver (Ag) being the most effective among conductive metals. Electroless Ag plating, in particular, has gained prominence for combining high electrical performance and processability. However, poor interfacial adhesion between the deposited Ag layer and the textile substrate often leads to particle detachment and oxidation, resulting in performance degradation under practical conditions such as mechanical deformation and sweat exposure. In this study, the electroless Ag plating process was systematically optimized to enhance the interfacial durability of Ag-plated nylon fibers. By precisely controlling the tin-based sensitization and plating parameters, a densely packed and continuously deposited Ag layer was formed on the nylon surface. The optimized fibers exhibited superior durability compared with commercial Ag-plated nylon fibers, especially under alkaline sweat exposure. This work provides a facile, energy efficient strategy for fabricating reliable and sweat-resistant conductive fibers suitable for wearable electronic applications.</p> Graphical Abstract <p></p>