Long-distance running puts repeated load on the heel and footbed. For running footwear, the insole needs to provide reliable cushioning while maintaining a stable and responsive feel throughout repeated movement.
The Ideastep XD-6189 Running Insoles are built for this type of application. The design combines a built-in steel spring in the heel with single-density PU cushioning foam, a contoured footbed, and a TPU foot cup.
What Matters in a Running Insole?
During running, the heel is exposed to repeated impact and loading. At the same time, the foot moves through a continuous cycle from heel contact to toe-off. An insole therefore needs more than soft cushioning. It also needs enough structure to maintain a consistent feel under repeated use.
The XD-6189 addresses these requirements through a combination of heel support, PU cushioning, and energy return.
Built-In Steel Spring in the Heel
The key feature of the XD-6189 is the steel spring built into the heel. Unlike a foam-only heel construction, the spring adds a resilient structural element that responds to repeated loading.
The spring has been fatigue tested for more than 2 million cycles. This testing supports the durability of the spring under repeated loading and makes it suitable for running applications where the heel is exposed to continuous mechanical stress.
Single-Density PU Cushioning
The heel spring is paired with single-density polyurethane cushioning foam. PU provides cushioning underfoot and helps absorb impact without making the insole dependent on a very soft foam structure.
The combination of PU and the heel spring gives the insole a balance of cushioning and resilience, which is useful for running shoes intended for regular training and longer-distance use.
Contoured Footbed and TPU Foot Cup
The contoured footbed follows the general shape of the sole, helping the foot maintain consistent contact with the insole during movement.
The TPU foot cup adds structure around the heel and helps keep the insole positioned inside the shoe. This construction is suitable for running footwear that requires a more structured alternative to basic flat foam insoles.
Energy Storage and Return
During the running cycle, the heel spring can compress under load and return energy as the foot moves forward. This provides a more responsive heel transition and supports assisted propulsion toward toe-off.
For long-distance running, this type of mechanical response can complement the cushioning provided by the PU layer, giving the insole a more responsive feel than a conventional foam-only design.
Applications
The XD-6189 is designed primarily for running footwear and can be used in:
- Long-distance running shoes
- Training shoes
- Performance running footwear
- Sports footwear
- Private-label running insoles
- OEM sports footwear projects
The structure is also suitable for brands developing running insole products with a stronger focus on heel response and mechanical support.
OEM and Wholesale Supply
For footwear brands and distributors, an insole needs to fit both the product specification and the sourcing model. Ideastep provides OEM, ODM, and custom-made production for sports and running insole projects.
Depending on the project, buyers can discuss requirements for materials, construction, branding, packaging, and other specifications. The XD-6189 can therefore be used as a base design for developing a customized running insole rather than being limited to a fixed retail specification.
Ideastep XD-6189 Specifications
| Specification | Details |
|---|---|
| Model | XD-6189 |
| Product Type | Running Insoles |
| Material | Polyester Fabric + PU + TPU Foot Cup |
| Heel Structure | Built-In Steel Spring |
| Function | Anti-Fatigue, Energy Storage |
| Main Feature | Stable Heel Spring |
| Cushioning | PU Single-Density Cushioning Foam |
| Application | Running & Sports Footwear |
| Cooperation | OEM / ODM / Custom |
Running Insoles with Heel Spring for B2B Applications
The Ideastep XD-6189 brings together a fatigue-tested heel spring, PU cushioning, a contoured footbed, and a TPU foot cup. The design is focused on the practical requirements of running footwear: cushioning, heel stability, and energy response.
For running shoe brands, sports footwear manufacturers, distributors, and wholesalers, the XD-6189 provides a ready-made platform for developing running insole products with OEM and ODM options.
Contact Ideastep to discuss samples, specifications, customization, and OEM requirements.
Related product links: https://www.aideastep.com/product/stretch-pu-insole-suitable-for-running-sports/.
