Resources · Material selection
EVA, rubber or TPR. The shoe decides.
Three materials cover most of what a footwear brief asks for. Here is how they compare on the properties that matter, when to pick each, and when the right answer is two of them moulded together.
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There is no best material. There is a best material for the shoe.
Ask three factories which sole material is best and you will get three answers, each matching whatever line that factory owns. The honest answer is shorter: an EVA sole wins on weight and cushioning, a rubber outsole wins on abrasion and grip, and a TPR sole sits between them with the fastest tooling and the cleanest colour. Most good shoes are decided by two or three properties. Find those, and the material picks itself.
Eight properties, three materials.
Framed in terms of the finished shoe, not the raw polymer. Rankings follow published industry data.
| Property | EVA sole | Rubber outsole | TPR sole |
|---|---|---|---|
| Weight | Lightest of the three | Heaviest | Mid-range |
| Cushioning & rebound | Excellent | Minimal | Low |
| Abrasion / wear life | Moderate | Highest | High |
| Grip / traction | Moderate | Best, wet or dry | Good |
| Cold-temperature flexibility | Good | Stiffens in the cold | Best |
| Unit cost at volume | Lowest | Highest | Mid-range |
| Colour & design freedom | Excellent | Limited | Excellent |
| Recyclability | Recyclable | No; vulcanised is thermoset | Recyclable, regrind-friendly |
Hardness is specified in Shore A for rubber and TPR, Shore C for an EVA sole. The scales are not interchangeable. The category runs roughly 30–90 Shore A for rubber, 40–80 Shore A for TPR and 20–35 Shore C for EVA sole stock. What we hold in production is narrower: 60–65 Shore A on casual rubber outsoles and 65–70 on safety, 60–65 Shore A on TPR, 55–60 Shore C at 0.25 g/cm³ on casual and slipper EVA soles, and 40–45 Shore C at 0.20 g/cm³ on running midsoles. Why the two scales do not convert, and how to write hardness into an enquiry, is inShore A, Shore C and the number that means nothing on its own.
When to pick which.
Three short checklists. If your brief matches two columns, read the combination section below.
Choose an EVA sole when
- Weight and cushioning lead the brief: walking, running, training, all-day comfort footwear.
- The unit price has to stay low at volume; EVA sole stock runs fast cycles with the lowest cost per pair.
- The design wants colour: an EVA midsole takes colour freely where rubber cannot.
- Watch out: a bare EVA outsole wears fast and compresses over time, and that is what the combination constructions below exist to fix.
Choose a rubber outsole when
- Abrasion and grip are non-negotiable: work boots, outdoor, court, anything wet underfoot.
- The shoe will see heat, oil or rough ground that would tear a softer compound.
- Accept the trade: heaviest of the three, longest cure cycles, steel tooling, and design changes are expensive once the tool is cut.
Choose a TPR sole when
- You need rubber-like grip with injection-moulding speed: fashion, seasonal and volume programmes.
- Colour fidelity matters: TPR reproduces colour cleanly and regrind goes back into the process.
- Cold flexibility is the best of the three, which is why it shows up in children’s and winter footwear.
- Watch out: TPR soles lose grip on smooth wet surfaces compared with vulcanised rubber.
When the answer is two materials.
The most common construction in athletic footwear is not a material at all: a rubber outsole where the ground is, an EVA midsole where the foot is. Abrasion and grip at the contact patch, cushioning and weight saving above it. It exists in two forms: arubber outsole bonded to an EVA midsole, and theone-piece moulded versionwith no bond line to delaminate. If your brief matched both the EVA sole and the rubber columns above, this is usually where the conversation ends up.
What the choice costs in production.
Performance is half the decision; the other half is how the material behaves in the factory. An EVA sole runs the fastest cycles and the lowest unit cost at volume, but density consistency between batches is the classic failure point in lower-grade supply chains, so ask any supplier how they control it. A rubber outsole cures slowly, runs in steel tooling, and resists design changes after the tool is cut. A TPR sole injects quickly and puts sprue regrind back into the process, which is part of why it dominates volume fashion programmes.
Tooling cost follows the same order: EVA sole moulds run in aluminium, rubber in steel, and every mould is priced per size. The numbers are inwhat a set of outsole moulds really costs. For the full comparison across all six sole families we build (including foamed rubber and IP injection soles), see thesole systems page.
Still between two materials?
Describe the shoe and what it has to survive. We come back with a material recommendation and a tooling plan before you commit to anything.