Additional multi-zone EVA structures in the forefoot and midfoot enhance flexibility and energy return. The perforated yellow and green forefoot zones improve ventilation and provide localized cushioning, supporting natural foot movement during fast-paced activities. The midfoot contour offers mild guidance without imposing rigid arch support, ensuring compatibility with a wide range of athletic footwear.

RT250404 is suitable for running, gym training, walking, and general sports use. Its lightweight construction ensures minimal added weight to the shoe while significantly improving underfoot comfort and impact control. The side profile remains slim and dynamic, enabling a secure fit inside most sport shoes without altering fit volume.

OEM/ODM options include EVA density customization, GEL hardness variation, top cover upgrades, color customization and branding integration. Packaging formats such as blister cards, polybags and private-label boxes can be tailored for both retail shelves and online distribution.

RT250404 provides a strong balance of EVA comfort and GEL heel protection, making it a versatile sport insole solution for B2B partners seeking high-performance cushioning within an accessible, mass-market product design.