These vibrant yellow silicone shoe insole protectors are designed to shield the inner lining of footwear from wear, sweat, and odor. Featuring a contoured U-shape that fits snugly over the insole area, they include a pattern of small perforations for enhanced breathability and moisture dispersion. Made from flexible, food-grade silicone, they are lightweight, reusable, and easy to clean—ideal for extending the life of sneakers, casual shoes, or athletic footwear. The product accommodates sizes 35–39 (EU), as indicated in the Chinese text overlay ('黄色小码 35-39码可用'), making them suitable for women or smaller-footed individuals. Perfect for daily wear, gym sessions, or travel, these protectors help maintain hygiene and freshness inside shoes without altering fit or comfort. Their minimalist design blends invisibly under footbeds, offering functional protection with zero bulk.