























































































































P1
Road Running, Walking, Supportive
We offer free shipping on all orders and the estimated delivery time is 2-5 working days in the US.
We offer free return or exchange on unworn, unwashed shoes within 30 days.

APMA Seal of Acceptance
This product received the American Podiatric Medical Association (APMA) Seal of Acceptance, awarded to products found by the Association to promote good foot health.
- 3D Archrail technology as a revolutionary stability enhancing solution
- GOFLOW midsole geometry to guide your stride
- LightCELL midsole base featuring excellent lightness and bounce
- Dual-zone insole provides exceptional arch support and heel stability
Men's
USA | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 14 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
EUR | 40 | 40.5 | 41 | 42 | 42.5 | 43 | 44 | 44.5 | 45 | 46 | 47 | 47.5 | 48 | 49 |
UK | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 13 |
CM SIZE | 25 | 25.5 | 26 | 26.5 | 27 | 27.5 | 28 | 28.5 | 29 | 29.5 | 30 | 30.5 | 31 | 32 |
Women's
USA | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
EUR | 35.5 | 36 | 36.5 | 37.5 | 38 | 38.5 | 39 | 40 | 40.5 | 41 | 42 | 42.5 | 43 |
UK | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 |
CM SIZE | 22 | 22.5 | 23 | 23.5 | 24 | 24.5 | 25 | 25.5 | 26 | 26.5 | 27 | 27.5 | 28 |
Drag horizontally to see more
Size Measuring Guide
A perfect fit for your ultra-marathon running shoes is important for comfort and performance. Follow these tips to measure your foot size at home:
General Tips:
- Measure your feet at the end of the day as they're at their largest due to swelling.
- In between sizes? One foot is bigger than the other? Take the larger size.
- It's best to measure every year. Your size could change over time.
What You'll Need:
- A piece of paper larger than your foot,
- A pen or pencil,
- A ruler or measuring tape,
- Socks of the thickness you'll wear with the shoes.
Steps:
- Stand on the paper in the socks you'll wear with the shoes.
- Use the pen or pencil to mark the end of your longest toe and the back of your heel. It's important to measure both feet as their size can vary.
- Match your measurements to our size chart to find the best fit. If you're between sizes, we suggest choosing the larger size for better comfort.






























Men's
USA | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 12.5 | 13 | 14 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
EUR | 40 | 40.5 | 41 | 42 | 42.5 | 43 | 44 | 44.5 | 45 | 46 | 47 | 47.5 | 48 | 49 |
UK | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 13 |
CM SIZE | 25 | 25.5 | 26 | 26.5 | 27 | 27.5 | 28 | 28.5 | 29 | 29.5 | 30 | 30.5 | 31 | 32 |
Women's
USA | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
EUR | 35.5 | 36 | 36.5 | 37.5 | 38 | 38.5 | 39 | 40 | 40.5 | 41 | 42 | 42.5 | 43 |
UK | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 |
CM SIZE | 22 | 22.5 | 23 | 23.5 | 24 | 24.5 | 25 | 25.5 | 26 | 26.5 | 27 | 27.5 | 28 |
Drag horizontally to see more
Size Measuring Guide
A perfect fit for your ultra-marathon running shoes is important for comfort and performance. Follow these tips to measure your foot size at home:
General Tips:
- Measure your feet at the end of the day as they're at their largest due to swelling.
- In between sizes? One foot is bigger than the other? Take the larger size.
- It's best to measure every year. Your size could change over time.
What You'll Need:
- A piece of paper larger than your foot,
- A pen or pencil,
- A ruler or measuring tape,
- Socks of the thickness you'll wear with the shoes.
Steps:
- Stand on the paper in the socks you'll wear with the shoes.
- Use the pen or pencil to mark the end of your longest toe and the back of your heel. It's important to measure both feet as their size can vary.
- Match your measurements to our size chart to find the best fit. If you're between sizes, we suggest choosing the larger size for better comfort.
























































































































Stability Shoes Reimagined From The Ground Up
Breaking the Mold
Pronation is essential to our normal gait, but for some runners, uncontrolled overpronation may lead to problems. For decades, lab studies have noted a correlation between overpronation – especially excessive foot eversion – and lower limb complaints. Historically this insight led many brands down the route of heavy motion control shoes. These shoes incorporate a rigid support structure within the medial side of the rearfoot and under the arch to control heel eversion and increase rearfoot stability. However, we believe there is something more important that requires our focus.

Research, Rethink, Run
Our biomechanics research revealed that runners who experience discomfort associated with overpronation tend to display excessive forefoot abduction. Normal forefoot function is vital for pain-free running as the forefoot spends more time in contact with the ground, experiences higher peak pressure, and acts as a rocker during propulsion. If we truly wish to manage complaints related to overpronation, we need to look towards the forefoot.
3D Archrail: A Stable Revolution
These findings led us to develop our groundbreaking 3D Archrail technology: a flexible support structure that significantly reduces peak forefoot abduction angles and activates the abductor hallucis muscle in the arch of your foot. The result is a revolution in stability that helps you to achieve better foot balance for irritation-free running.
Feel the Lightweight Cushioning
Our LightCELL™ compound is fueled by the industry-leading nitrogen supercritical foaming process. It is eco-friendly and showcases 50% reduced weight and 45% increased energy return compared to traditional EVA midsoles.


Get in the Zone
Designed to guide you from heel to toe, our GOFLOW midsole geometry steers each of your foot strikes to help you stay in the flow state and enjoy a consistently smooth running experience.


Provides exceptional arch support and heel stability you need on the longest runs.


Offers quick lockdown with increased support on the midfoot.


Creates a plush step-in feel with foot-hugging comfort.
I ran in college 15 years ago; since then a variety of knee and foot issues have kept me in and out of running. I struggle with high arches, pronation, some meniscus damage, and achilles problems. All together, I have really had difficult finding a shoe that checked enough boxes to avoid running in pain. I have tried pretty much every stability or guidance shoe on the market. This is the only shoe I have worn that has proven to be comfortable, light, and provide me the stability I need to avoid running in pain. The comfort is excellent, and they have proven durable, and responsive over the first 150 miles or so. I have recently done some shorter trail runs and they have done well even on varied terrain. The lacing system is superb, the shoe quality is excellent. My wife also has a pair of P1s which she loves.
It is worth the money, and well worth deviating from the major shoe players. I just bought a pair of T1s as well.
Bought this in the women's agave version and it was so good my teenage son wore them one day and claimed them, so I had to buy him his own. My husband then tried them in my son's size and now he wants a pair. Very comfortable and the squish seems to last. Very happy with our purchases.
Love the feel on both feet. Very comfortable!!!
It’s so comfy and good looking shoes. It’s also light weight.
Really enjoy the wide toe box and very light weight.