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100% Free Worldwide Shipping on All Running Orders




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Free standard shipping on orders
We are pleased to offer Free Worldwide Shipping on all orders, delivering to all countries and regions supported by our logistics network.
There are no restrictions on order quantity, parcel size, or shipment weight — every order ships at no cost to you. In addition, all customs duties, import taxes, and government-imposed fees associated with your shipment will be fully covered by us, ensuring you will not incur any extra charges upon delivery.
Please note that delivery times may vary due to local customs procedures and carrier conditions, but your shipping and customs costs will remain completely free under this policy.
We provide a secure and reliable Free Returns service for all customers. Items that remain unused and unopened may be returned within 60 days for a full refund.
All return shipping expenses, including customs-related fees, are fully covered by us.
Refund processing will be completed within 4 weeks from the date the return shipment is sent, regardless of whether the package has arrived at our facility. In general, refunds are finalized significantly earlier, ensuring a smooth and dependable experience.
Train fast in the Hyperion Max 4 — our lightweight women's race training shoe. High‑stack cushioning helps soften impact, while the propulsive nylon plate helps you fly.
Best forFast workouts, Training runs, Long runs
CushionResponsive
Light and springy cushioning that propels you forward.
SupportMax support
Assisted transition from landing to toe-off and added cushion underfoot
Midsole drop6mm
Weight8.8oz / 249.5g
FeaturesBreathable and secure upper, Quick and easy transitions, Nylon SpeedVault plate, 45mm total stack height
| US men’s shoe size | US women’s shoe size | UK shoe size | European shoe size | |
|---|---|---|---|---|
| S | 4-6.5 | 3-4.5 | 34-37 | |
| M | 6-8.5 | 7-9.5 | 5-7.5 | 38-41 |
| L | 9-11.5 | 10-12.5 | 8-10.5 | 42-45 |
| XL | 12-14.5 | 11-13.5 | 46-49 |
| US | UK | Europe |
|---|---|---|
| 5 | 4 | 37.5 |
| 5.5 | 4.5 | 38 |
| 6 | 5 | 38.5 |
| 6.5 | 5.5 | 39 |
| 7 | 6 | 40 |
| 7.5 | 6.5 | 40.5 |
| 8 | 7 | 41 |
| 8.5 | 7.5 | 42 |
| 9 | 8 | 42.5 |
| 9.5 | 8.5 | 43 |
| 10 | 9 | 44 |
| 10.5 | 9.5 | 44.5 |
| 11 | 10 | 45 |
| 11.5 | 10.5 | 45.5 |
| 12 | 11 | 46 |
| 12.5 | 11.5 | 46.5 |
| 13 | 12 | 47.5 |
| 14 | 13 | 48.5 |
| 15 | 14 | 49.5 |
| 16 | 15 | 50.5 |
| All gender | Men's | Women's | |
|---|---|---|---|
| Narrow | B | B | 2A |
| Medium | D | D | B |
| Wide | 2E | 2E | D |
| Extra Wide | 4E | 4E | 2E |
| Bicep circumference | |
|---|---|
| XS/S | 8-11 |
| M/L | 11-14 |
| XL/XXL | 14-16 |
| Palm to fingertip length | |
|---|---|
| XS | 7 or less |
| S | 7-7.5 |
| M | 7.5-8 |
| L | 8-9 |
| XL | 9 or longer |
| Head circumference | |
|---|---|
| S/M | 19-22 |
| L/XL | 21-23 |
| Product size | US men's top size | US women's top size | Chest | Waist |
|---|---|---|---|---|
| XXS | XXS | XS | 31-33 | 24-26 |
| XS | XS | S | 33-35 | 28-30 |
| S | S | M | 35-37 | 30-32 |
| M | M | L | 37-40 | 32-34 |
| L | L | XL | 40-43 | 34-37 |
| XL | XL | XXL | 43-47 | 37-42 |
| XXL | XXL | XXXL | 47-52 | 43-47 |
* All measurements are in inches. Measure bare foot from heel to longest toe for
accurate sizing.
* If your foot size falls between two sizes, size up for thicker padded & thermal
socks.
* Ski, hiking and work socks feature extra cushioning; lightweight running socks have slim stretch
fit.
* Limited edition casual socks maintain standard elastic stretch for all-day daily wear.
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