Quick answer: ETPU (expanded thermoplastic polyurethane) is a high-performance bead foam with outstanding rebound and energy return. It is light, durable and bouncy, which is why it pioneered the modern super-foam running shoe. It is also used in protective gear and high-rebound cushioning.

What is ETPU foam?

ETPU stands for expanded thermoplastic polyurethane. Like EPP and EPS, it starts as small resin beads that are expanded and fused inside a mould. But the base polymer — thermoplastic polyurethane — gives ETPU exceptional elasticity. Each bead behaves like a tiny spring, so the foam returns a high proportion of the energy put into it.

Key properties of ETPU

Two things stand out: ETPU's energy return is higher than EPP or EVA, and it stays soft and resilient in cold weather, an advantage that matters for winter sports and outdoor footwear.

Why ETPU matters in footwear

ETPU became famous as the material behind the first super-foam running shoes. Bead foams like ETPU are lighter and more responsive than traditional EVA, and they do not pack out as quickly. The result is more cushioning and more energy return per gram of material.

Manufacturing shoe midsoles from ETPU requires precise tooling — see ETPU sports shoe sole moulds and ETPU moulds with texture.

Other applications

• Protective gear that needs high rebound and repeated impact resistance.
• Sports equipment components and cushioning.
• Premium consumer products where feel and durability matter.

For durable, reusable parts at a lower cost, EPP is often the alternative — see EPP molds.

ETPU vs EPP vs EVA

ETPU sits at the performance end of the range: the highest cost, but also the highest rebound and the best cold-weather feel. Materials are supplied as raw beads — see ETPU raw materials and EPS, EPP and ETPU bead supply.

Frequently asked questions

What does ETPU stand for?

ETPU stands for expanded thermoplastic polyurethane. It is a bead foam made by expanding and fusing thermoplastic polyurethane beads in a mould.

Is ETPU better than EVA?

For performance, yes. ETPU has higher rebound, better durability and keeps its resilience in cold weather, whereas EVA packs out over time.

Is ETPU foam recyclable?

Yes. Because it is a thermoplastic, ETPU can in principle be recycled, though collection infrastructure for expanded bead foams is still developing.

What is ETPU used for besides shoes?

Protective gear, sports components and premium cushioning products. Anywhere high rebound and repeated impact resistance are needed, ETPU is a strong candidate.

Related products and guides

• ETPU Sports Shoe Sole Molds
• ETPU Raw Materials
• EPS, EPP and ETPU Bead Supply
• EPP Mold Manufacturer