S1
S1
White|Black, Road Running, Daily Training
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SIZE GUIDE
SIZE GUIDE
Men's
USA | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 11.5 | 12 | 13 | 14 |
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EUR | 40 | 40.5 | 41 | 42 | 42.5 | 43 | 44 | 44.5 | 45 | 46 | 47 | 48 | 49 |
UK | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 | 12 | 13 |
CM SIZE | 25 | 25.5 | 26 | 26.5 | 27 | 27.5 | 28 | 28.5 | 29 | 29.5 | 30 | 31 | 32 |
Women's
USA | 5 | 5.5 | 6 | 6.5 | 7 | 7.5 | 8 | 8.5 | 9 | 9.5 | 10 | 10.5 | 11 |
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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 |
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PRODUCT DETAILS
PRODUCT DETAILS
Weight
Heel-To-Toe Drop
Cushion
Stability
SHIPPING & RETURNS
SHIPPING & RETURNS
- The estimated delivery time is 2-5 working days.
- We offer free shipping on all orders and free return or exchange on unworn, unwashed shoes within 30 days.
KEY FEATURES
KEY FEATURES
- ZeroSag midsole insert with little degradation during long runs
- LightCELL midsole base featuring excellent lightness and bounce
- GOFLOW midsole geometry to guide your stride
- Outstanding stability for your long-distance training
- Breathable and eco-friendly
5.0 / 5.0
(4) 4 total reviews
S1 White|Black, Road Running, Daily Training
All Day, Every Day
The S1 is our take on the everyday road trainer, engineered for ultras. Designed to excel on the longest training runs, the S1 has been proven in training and competition the world over. With all the comfort, support and longevity you need, the S1 is the greatest training companion any ultrarunner could ask for.
![](https://cdn.shopify.com/s/files/1/0636/3191/7108/files/02_2x_bedaaf14-f7b8-4724-a7c4-5699da9b1922.png?v=1713981172)
S1gned, Sealed, Delivered
In the spring of 2024, Asian ultrarunner Lucong Geng traveled to Scotland to run the JOGLE, a multistage road ultra to the most southerly tip of England. Covering 854 miles (1,374 km) over 17 daily stages, Lucong broke the Asian record for the route, covering more than 600 miles of the journey in a single pair of Mount to Coast S1s.
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Cushioning You Can Rely On
Meet ZeroSag, our revolutionary midsole insert crafted in collaboration with BASF. Originally designed to perform in the shock absorbers of high-speed racing cars, ZeroSag guarantees consistent cushioning and stability on the longest journeys, day after day, mile after mile.
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Lighten Up and Find Your Pace
The foundational element of the S1's midsole, our LightCELL compound is a PEBA-hybrid powered by the industry-leading nitrogen supercritical foaming process. The result is 50 percent less weight and 45 percent more bounce when compared with traditional EVA midsoles.
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Flow Like Water
Engineered to guide your foot from heel to toe, GOFLOW is our industry leading midsole geometry designed to help you find your flow, from the first mile to the last. Informed by our own biomechanical research, GOFLOW precisely guides each foot strike in an optimal pattern, ensuring an enjoyable running experience, day after day.
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Eco-Friendly Breathability
Our engineered Jacquard mesh combines exceptional softness with a hardwearing, tailored fit. And by utilizing 100 percent recycled yarn, it's more sustainable, so it plays a part in creating a greener planet.
Details You'll Love
![](https://cdn.shopify.com/s/files/1/0636/3191/7108/files/S1-DETAIL-WB-0425.png?v=1714039394)
Let me start by saying I’m super hesitant to try anything new after running in the same shoe/insole combo over 15 years for hundreds of marathons, and hundreds of halfs, but trusting my first marathon coach, I said okay. I was so surprised that I didn’t need my Superfeet (and my history of R hip/IT issues and/or blisters without the insoles definitely made me nervous)!
The S1 look is simple and clean, and they are so light. The soft sole scared me that my far-from-perfect foot strike would turn into blisters or injury, especially without firm insoles, so I started with a hard effort interval treadmill run (5+ miles) and was relieved I felt great. I ran indoor intervals again the next morning just to be sure, and without issue moved out to the real world for pavement, concrete, and compact gravel. I somehow ran faster than usual (since I’m usually fatigued after the tread class) and had put 16 miles on these new S1s right out of the box. The shoe hugs my foot and moves with me, making transitions effortless and painless! My toes and forefoot appreciated the extra room in the toe box without that sense of swimming around. Friends asked what I thought and I had a big smile and said, “they are my Magic shoes”! I can’t wait for my multiple races coming up, and am glad I don’t need to add insoles to my shoe orders anymore! These shoes are so comfortable - it really was love at first step!
60 miles in and they look brand new. These are the only shoes I want to wear when I run now. They feel great, no hot spots, no pinching. Best thing I can say: It feels like I'm not wearing shoes.
From the moment I opened the box, I was struck by how sleek and stylish these shoes are. From the first run, I noticed how well they fit. The cushioning system is designed to absorb impact, reducing strain on my joints during long runs, making every step feel light and effortless. These running shoes have exceeded my expectations in every way, with cutting-edge technology and a stylish design. Whether you're an avid runner or just looking for a great pair of everyday shoes, I highly recommend giving these a try. They are worth every penny and have quickly become my go-to footwear for all activities.
Really enjoy the light weight and responsive feel of the shoe. It seems to get more comfortable with every mile.