Custom Insole OEM/ODM Development & Manufacturing in China

Dongguan Goldsea Insole Co., Ltd. is a custom insole OEM/ODM manufacturer in Dongguan, China. Brands can start with an idea, drawing or sample; our team moves the project through requirement review, engineering, material selection, prototyping, tooling, sampling, production and quality control.

What We Evaluate During Insole Development

Every project is reviewed around its intended use and manufacturing requirements rather than a one-size-fits-all formula.

Structure & Fit

Arch, heel and forefoot zones, overall profile, thickness, shoe-space limits and full-length or partial-length formats.

Material Combination

Foams, support components, gels, composites and top covers are combined around the required feel, durability and target cost.

Prototype to Production

The design is refined through samples before mold, tooling and repeatable production requirements are confirmed.

You Can Start with an Idea, Drawing or Sample

  • Target user, footwear type and intended use
  • Required dimensions, thickness and support priorities
  • Reference sample, sketch, CAD file or product concept
  • Preferred materials, target market and commercial requirements

A Six-Step OEM/ODM Development Process

  1. 01 — Product Requirement Review

    We review the idea, drawing, sample, target use, dimensions, performance priorities and commercial requirements before recommending a development path.

  2. 02 — Design & Engineering Development

    We evaluate structure, fit, thickness, assembly and manufacturability, then identify the decisions that need to be validated in a prototype.

  3. 03 — Material Selection & Engineering

    Materials and layer combinations are selected around the required comfort, support, durability, weight, process compatibility and target cost.

  4. 04 — 3D Modeling & Prototype Validation

    CAD models and physical prototypes help both teams review dimensions, construction and production feasibility before committing to tooling.

  5. 05 — Tooling Development & Sampling

    After the structure is agreed, the project moves into mold or tooling development, production sampling and customer approval.

  6. 06 — Mass Production & Quality Control

    The approved sample becomes the production reference for material checks, process control, assembly, packaging and shipment.

Start with a Prototype or Small Pilot Run

For qualified product-development projects, Goldsea can evaluate a prototype or small pilot run before scaling to repeatable production. Feasibility, materials, tooling and order quantities are reviewed for each project.

Material selection FAQ

Which insole materials suit leather, casual and sports-inspired footwear?
It depends on the shoe's internal volume, target feel and cost. We usually start leather footwear with a thin PU or latex base, casual styles with EVA or PU cushioning, and sample ETPU alongside EVA or PU for sports-inspired lines, then confirm everything with prototypes. Read the material-selection guide
Do you publish fixed specifications for these constructions?
No. Grade, density, hardness and thickness are confirmed per project on samples in your shoe, because the same material name can behave very differently.