Last Updated on August 21, 2026
| Quick Answer: Running Shoe Foam Guide. Running shoe foam is the cushioning material in the midsole between your foot and the outsole. The major foam families include EVA, TPU, PEBA and TPEE, along with proprietary blends based on these and other materials. EVA is widely used for everyday cushioning, TPU is known for resilience and durability, while PEBA and newer performance foams are often used when low weight and high rebound matter. No foam is best for every runner. The right choice depends on whether you want softness, stability, durability, speed or everyday comfort. Use the comparison tables below to find the foam and shoes that best match how you run or walk. |
What Is Running Shoe Foam?
Running shoe foam is the cushioning material used in the midsole of a running or walking shoe.
The midsole sits between your foot and the outsole, which is the harder bottom surface that touches the road, treadmill or trail.
Foam affects several things you feel while wearing a shoe, including cushioning, softness, firmness, stability, weight and responsiveness. However, foam is only one part of the ride. Stack height, rocker shape, heel-to-toe drop, plates, outsole construction and the width of the shoe also matter.
Understanding foam is useful because shoe brands use dozens of names such as ZoomX, DNA LOFT, PWRRUN, Fresh Foam X and FF BLAST MAX. Those names can make two very similar materials sound completely different.
The first step is separating the base material from the brand name.
Running Shoe Foam Terms Explained
A few terms appear repeatedly in running shoe descriptions. Knowing what they mean makes foam comparisons much easier.
| Term | What It Means |
|---|---|
| Midsole | The cushioning layer between your foot and the outsole |
| EVA | Ethylene-vinyl acetate, a common lightweight shoe foam |
| TPU | Thermoplastic polyurethane, often used for resilient and durable cushioning |
| PEBA | Polyether block amide, a lightweight material widely associated with performance foams |
| TPEE | Thermoplastic polyester elastomer, another material used in some high-performance foams |
| Density | How compact the foam material is |
| Compression | How much foam changes shape when you load it |
| Rebound | How quickly the foam returns after compression |
| Energy return | The portion of mechanical energy the foam returns after it is compressed |
| Supercritical foam | Foam produced using a gas-based manufacturing process that changes its internal cell structure |
| Superfoam | An informal running-shoe term for lightweight, highly responsive performance foam |
The important distinction is that EVA, TPU, PEBA and TPEE describe material families. Terms such as supercritical describe how foam may be manufactured, while names such as ZoomX and PWRRUN PB are branded technologies.
The Main Types of Running Shoe Foam
Most modern running shoe foams can be understood by looking at a few main material families.
EVA Foam
EVA, or ethylene-vinyl acetate, has been used in running shoes for decades and remains extremely common.
Traditional EVA is relatively light, easy to shape and economical to produce. Manufacturers can change its density and formulation to make it softer, firmer or more stable.
Modern EVA is much more advanced than the basic foam found in older athletic shoes. It may be compression molded, blended with other materials or processed using gas to improve its cushioning and rebound.
HOKA, for example, continues to use compression-molded EVA in the Clifton 11. Brooks’ DNA LOFT family also incorporates EVA as part of its cushioning formulation.
For a deeper explanation, see our guide to EVA foam in shoes.
TPU Foam
TPU stands for thermoplastic polyurethane.
In running shoes, TPU can be made into cushioning that is resilient and resistant to repeated compression. One well-known version is expanded TPU, where small foam pellets are expanded and fused together.
Saucony uses TPU in PWRRUN+, while adidas uses expanded TPU particles in Boost cushioning.
TPU can be a good choice for buyers who care about long-lasting cushioning and a consistent ride, although individual TPU shoes can still feel very different.
Read more about Saucony PWRRUN+ foam and our overview of TPU.
PEBA Foam
PEBA stands for polyether block amide.
PEBA has become closely associated with premium performance running shoes because it can be made into very light and responsive cushioning.
Saucony identifies PWRRUN PB as PEBA foam and uses it in faster shoes as well as some highly cushioned trainers. New Balance also confirms that the FuelCell Rebel v5 uses a blend of PEBA and EVA.
PEBA does not automatically make a shoe faster or better. The amount of foam, shape of the midsole, shoe weight, plate design and runner all affect performance.
Learn more about PEBA foam.
Learn more in our PWRRUN PB guide.
TPEE and Other Thermoplastic Foams
TPEE stands for thermoplastic polyester elastomer.
It is another material being used in modern performance cushioning. Saucony, for example, identifies IncrediRUN as a proprietary TPEE blend designed for lightweight, responsive performance.
Other companies use proprietary thermoplastic compounds without always publishing the exact chemistry.
That is why it is risky to assume every brand foam belongs to a specific chemical family. When the manufacturer does not identify the base polymer, it is better to describe the technology as proprietary rather than guess.
Foam Material vs. Brand Foam Technology
This is one of the most important things to understand when comparing running shoes.
A material name and a brand technology name are not the same thing.
PEBA is a polymer family. PWRRUN PB is Saucony’s branded foam technology that uses PEBA.
EVA is a material. DNA LOFT is Brooks’ branded cushioning family that includes EVA along with other ingredients.
ZoomX is a Nike foam technology. ReactX is another Nike technology. Nike describes their performance characteristics, but buyers should not assume that the branding alone tells them the exact chemical formula.
This distinction becomes particularly important when a company updates a foam but keeps the same shoe name.
A newer generation of a shoe may use a completely different cushioning system from the version you owned three years ago.
Running Shoe Foam Comparison Table
The table below compares important current foam technologies and gives an example shoe for each. Foam formulations and shoe lineups change, so this table was technology-audited in August 2026.
Where a manufacturer has publicly identified the material, it is listed. Where the chemistry is not clearly disclosed, the table says so rather than guessing. Current manufacturer information supports the classifications for Saucony, Brooks, HOKA, ASICS, New Balance, Nike and adidas used below.
Foam Technology | Brand | Material or Type | Typical Role | Example Shoe | Check Price of Example Shoe |
|---|---|---|---|---|---|
Multiple | EVA | Everyday cushioning | HOKA Clifton 11 | ||
PWRRUN | Saucony | EVA blend | Balanced daily training | Saucony Kinvara 16 | |
Saucony | TPU | Durable daily cushioning | |||
Saucony | Responsive training and speed | ||||
IncrediRUN | Saucony | TPEE blend | High-performance running | Endorphin Elite 2 | |
Saucony | A-TPU-based foam | Plush daily and long-run cushioning | Saucony Triumph 24 | ||
Brooks | EVA-based, nitrogen-infused system | Soft daily cushioning | |||
ASICS | Proprietary foam | Energetic daily cushioning | |||
New Balance | Proprietary foam family | Soft everyday cushioning | |||
FuelCell | New Balance | Varies by model; Rebel v5 uses PEBA/EVA | Responsive running | FuelCell Rebel v5 | |
Nike | Proprietary performance foam | Racing and responsive training | Nike Vaporfly 4 | ||
ReactX | Nike | Proprietary foam | Everyday running | Nike Pegasus 42 | |
Boost | Adidas | Expanded TPU | Durable comfort | Adidas Ultraboost | |
HOKA | Supercritical foam system | Responsive daily running |
Which Running Shoe Foam Should You Choose?
Most shoe buyers do not need to choose foam by chemistry alone. It is more useful to start with the kind of ride and use you want.
If You Want | Look For | Foam Types Often Used |
|---|---|---|
Affordable everyday cushioning | Balanced, predictable ride | EVA or EVA blends |
Long-lasting cushioning | Resilient foam | TPU |
Lightweight, lively training | Lower weight and stronger rebound | PEBA or performance blends |
Plush walking comfort | Soft foam with a stable platform | EVA, TPU or proprietary comfort foam |
Fast training | Responsive foam with efficient geometry | PEBA, TPEE or premium proprietary foam |
Racing | Lightweight performance foam, often combined with a plate | PEBA, TPEE and other performance foams |
Stability | Firmer or structured cushioning with a broad platform | Any foam family, depending on shoe design |
Do not treat this table as a rule that every runner must follow. A comfortable shoe that fits properly is more useful than a high-tech foam that does not suit your foot.
For specific models, see our best cushioned running shoes and running shoe reviews.
Does Softer Foam Mean Better Cushioning?
No. Softness and cushioning are related, but they are not the same thing.
A very soft foam may compress deeply under your weight. Some people enjoy that plush sensation, while others find it unstable or tiring.
A firmer foam may compress less but still protect the foot effectively by spreading load across a larger midsole.
Responsiveness is another separate quality. A shoe can be soft without feeling springy. It can also feel firm but rebound quickly.
This is why terms such as soft, cushioned, responsive and energetic should not be used as if they mean exactly the same thing.
What Is Foam Density?
Foam density describes how much material is packed into a given volume.
In simple terms, lower-density foam can often feel lighter and softer, while higher-density foam may feel firmer or more supportive. However, density does not tell the entire story. The polymer, cell structure, manufacturing method and midsole shape all influence how the finished shoe feels.
Some stability shoes also use more than one foam density. A firmer section may be placed where the manufacturer wants more structure while softer cushioning is used elsewhere. This is often called dual-density cushioning.
What Is Supercritical Foam?
Supercritical foam is created using a manufacturing process that introduces gas into the material under controlled pressure and temperature.
The process can change the size and structure of cells inside the foam, allowing manufacturers to tune its weight, softness and rebound.
Supercritical is not a separate foam family. A supercritical EVA foam is still based on EVA.
Brooks says its DNA LOFT v3 uses nitrogen through a supercritical foaming process. HOKA describes the Clifton Pro as using an SCF, or supercritical foam, midsole.
This distinction matters because a product description that says “supercritical foam” does not necessarily tell you which base polymer is being used.
Is Superfoam the Same as Supercritical Foam?
No. “Superfoam” is an informal performance term. It is commonly used to describe very light, responsive modern cushioning used in fast trainers and racing shoes.
“Supercritical” refers to a manufacturing process.
A superfoam may be produced using supercritical processing, but the words do not mean the same thing.
PEBA is also not another word for superfoam. PEBA is a material that can be used to make high-performance foam. Keeping these terms separate makes running shoe marketing much easier to understand.
How Foam Works With Stack Height, Rockers and Plates
Foam does not determine a shoe’s ride by itself. Several other parts of the shoe work with the midsole to change how it feels.
Important factors include:
- Stack height, which is the amount of shoe between your foot and the ground.
- Heel-to-toe drop, which describes how much higher the heel sits than the forefoot.
- Rocker geometry, which can help roll the foot forward.
- Midsole width, which can affect stability.
- Carbon-fiber or nylon plates, which can make the shoe stiffer.
- Outsole rubber, which affects weight, grip and how flexible the shoe feels.
That is why two shoes using the same foam can perform very differently.
HOKA provides a good example. The Clifton 11 uses compression-molded EVA with its MetaRocker geometry, while the Clifton Pro combines supercritical foam with a more aggressive rocker. The material and the geometry work together to create different rides.
Which Running Shoe Foam Lasts the Longest?
There is no universal winner because durability depends on the exact formulation and the complete shoe.
Traditional EVA can gradually compress with use. TPU is often chosen when manufacturers want greater resilience and durability. Saucony specifically positions PWRRUN+ TPU as a durable high-mileage cushioning material, while adidas describes Boost as expanded TPU.
That does not mean every TPU shoe will automatically outlast every EVA or PEBA shoe.
Runner weight, gait, weekly mileage, terrain, outsole coverage and how frequently the shoe is worn can all affect how long it feels good.
Instead of replacing shoes based only on a mileage number, pay attention to significant changes in cushioning, stability and outsole wear.
Which Foam Is Best for Walking?
Walking usually places different demands on a shoe than fast running. Most walkers benefit more from comfort, stability and consistency than from maximum energy return.
Traditional EVA, modern EVA blends, TPU and many proprietary daily-training foams can all work well. A broad platform can be particularly useful because a very soft, tall shoe may feel less stable at walking speeds.
People who spend the entire day on their feet may also prefer cushioning that remains predictable rather than extremely springy.
See our best walking shoes for current buyer recommendations.
Which Foam Is Best for Daily Running?
Daily trainers need to handle repeated mileage without forcing runners into an extreme ride. EVA blends, TPU and many modern proprietary foams work well in this category.
Examples include PWRRUN, PWRRUN+, DNA LOFT v3, Fresh Foam X, ReactX and FF BLAST MAX.
Some brands are also bringing performance materials into everyday shoes.
New Balance’s FuelCell Rebel v5, for example, combines PEBA and EVA, showing how the line between traditional daily foam and performance foam continues to blur.
For current models and newly released foam technologies, see our 2026 running shoe release guide.
Which Foam Is Best for Racing?
Race shoes usually place more emphasis on low weight, rebound and efficient geometry.
PEBA is widely used in this category, although it is not the only option.
Saucony uses PEBA-based PWRRUN PB and PWRRUN HG in performance shoes and TPEE-based IncrediRUN in the Endorphin Elite 2. Nike uses ZoomX in the Vaporfly 4 and pairs it with a full-length carbon-fiber plate.
The plate is important. Responsive foam alone does not create a racing shoe. Shoe weight, stiffness, rocker geometry, stack height and fit all contribute to the final result.
How Major Running Shoe Brands Approach Foam
Each company uses a slightly different foam strategy.
Saucony
Saucony has one of the clearest foam families.
PWRRUN is an EVA blend, PWRRUN+ uses TPU, PWRRUN PB uses PEBA, and IncrediRUN uses a TPEE blend. The newer IncrediLUX foam in the Triumph 24 uses an A-TPU-based compound.
Read our guides to PWRRUN+ and PWRRUN PB.
Brooks
Brooks’ DNA LOFT family is designed around soft cushioning. Brooks says DNA LOFT combines EVA foam, rubber and air. DNA LOFT v3 adds nitrogen using a supercritical process to create a softer, lighter and more responsive version.
See our complete Brooks DNA LOFT guide.
ASICS
ASICS uses several branded cushioning systems, including FF BLAST PLUS, FF BLAST PLUS ECO, FF BLAST MAX and FF TURBO variants. The Novablast 6, for example, combines FF BLAST MAX with an FF TURBO SQUARED forefoot section.
Our ASICS foam guide explains how the main versions compare.
New Balance
New Balance uses Fresh Foam X for many comfort-focused trainers and FuelCell for more responsive shoes.
The exact FuelCell formulation can vary. New Balance specifically identifies the Rebel v5 as using a PEBA/EVA blend, which is why FuelCell should not be treated as a single fixed material across every shoe.
See our Fresh Foam X guide.
Nike
Nike’s two important modern foam names include ZoomX and ReactX.
ZoomX is positioned as Nike’s most responsive foam and appears in performance shoes such as the Vaporfly 4. ReactX is used in daily trainers such as the Pegasus 42. Nike says ReactX is more responsive than its previous React technology.
Read our complete Nike ZoomX guide.
HOKA
HOKA continues to use EVA alongside newer supercritical foam systems.
The Clifton 11 uses compression-molded EVA. The Clifton Pro uses HOKA’s PROGLIDE+ system with an SCF foam midsole and more aggressive rocker geometry.
See our HOKA PROGLIDE+ guide.
adidas
adidas Boost is made from expanded TPU particles.
The company also uses newer performance technologies such as Lightstrike Pro across its Adizero range. Because proprietary performance foam formulations can change, the safest approach is to check the current model rather than assume every shoe carrying a foam family name has identical chemistry.
Related BestWalkingFeet Resources
If you are comparing cushioning technologies or shopping for a specific type of shoe, these guides go deeper into the subjects covered here:
- What Is EVA Foam in Shoes?
- What is PEBA Foam in Shoes?
- What Is PWRRUN+ Foam?
- What Is PWRRUN PB?
- Brooks DNA LOFT Guide
- ASICS Shoe Foam Guide
- New Balance Fresh Foam Guide
- What Is Nike ZoomX?
- What Is HOKA PROGLIDE+?
- Best Cushioned Running Shoes
- Running Shoe Reviews
Frequently Asked Questions About Running Shoe Foam
There is no single best running shoe foam. EVA works well for many everyday trainers, TPU is useful when durability and resilience matter, and PEBA and other performance foams are commonly used for lighter, more responsive shoes. Fit, shoe geometry and intended use matter as much as the foam itself.
Neither is always better. EVA can provide dependable cushioning, stability and value for everyday running. PEBA is often chosen for lightweight, responsive performance shoes. A daily runner may prefer an EVA trainer, while someone buying a race shoe may prefer a PEBA-based option.
There is no universal ranking because formulations and test methods differ. High-performance PEBA and TPEE foams are commonly designed around strong rebound, while manufacturers also use advanced proprietary materials and supercritical processing to improve responsiveness.
Softness depends on the formulation rather than simply the foam family. EVA, TPU, PEBA and proprietary foams can all be engineered to feel soft. Midsole thickness and shoe geometry also change how soft a shoe feels underfoot.
Supercritical foam is cushioning made using a gas-based manufacturing process that changes the foam’s internal cell structure. The process can help manufacturers reduce weight or change softness and rebound. Supercritical describes the manufacturing method, not the base material.
Yes. All running shoe cushioning changes with repeated use. How quickly it changes depends on the material, formulation, runner, mileage, terrain and shoe construction. A noticeable loss of cushioning or stability is more useful than a single replacement-mileage rule.
Not always. Premium foams may reduce weight or increase rebound, but those features may not matter for someone who mainly walks or runs easy daily miles. A less expensive shoe that fits well and provides the right stability may be the better purchase.
Yes. The same branded foam can feel very different depending on stack height, density, midsole shape, rocker geometry, outsole coverage and whether the shoe includes a plate. The complete shoe matters more than the foam name by itself.
