The Race Day Sock
Size Chart
| S | M | L | XL | |
| EU | 36-38 | 39-41 | 42-44 | 45-47 |
| US MEN | 4-6 | 6.5-8 | 8.5-10.5 | 11-12.5 |
| US WOMEN | 5.5-7.5 | 8-9.5 | 10-11.5 | 12.5-14 |
| UK | 3.5-5.5 | 6-7.5 | 8-9.5 | 10-12.5 |
Shipping & Product Details
Welcome to our new US webstore! We’re just getting started, so we really appreciate your patience. As a small brand, we're still smoothing out a few things here and there to make sure we deliver the best shipping experience possible.
Shipping Details:
- USA: We ship all orders with USPS, and it typically takes 3-7 business days, depending on how far you are from our warehouse in Denver, CO.
- Canada: We use USPS too, but your packages will be handed over to Canada Post, arriving in about 4-9 business days.
- International: For shipping outside the US and Canada, please check out our EU website.
It usually takes us 1-2 business days to get your order ready to go. Remember, we only ship on business days (Monday to Friday), so if you order over the weekend, we’ll start processing it first thing Monday.
The Race Day Sock is an ultralight, secure, and form-fitting sock made specifically for racing. Its design focuses on fit, fusing ultra-fine breathable fibers with strong, targeted compression, resulting in a thin yet extremely strong structure.
Targeted compression meets ultra-light fibers for minimal friction, great moisture-wicking and a cooling long distance performance.
Made with ECONYL® yarn from regenerated nylon waste and knitted with 100% renewable energy, waste recycling and micro-plastic filtration.
Engineered in Germany. Sourced and manufactured locally by some of Europe’s best garment makers.
The most technical sock we ever developed. And the most environmentally friendly.
The RDS 1.0 is both our lightest and strongest sock at the same time, combining an absolute minimum of friction with a maximum of breathability and moisture-wicking. Following more than 50 prototypes and a rigorous testing process, we're incredibly proud of its fit and feel. But it's not only our most technical sock, it's also the most environmentally friendly sock we ever made.
↳ + 22% MADE FROM REGENERATED NYLON WASTE
The RDS uses one of the best sustainable yarn options available. Our ECONYL® yarn offers the same quality and performance as virgin fibers, but with outstanding environmental benefits as it is regenerated from nylon waste that would otherwise pollute the Earth.
↳ 100% TRANSPARENT & LOCAL SUPPLY CHAIN
Sustainability is an obscure undertaking. Which is why we made it our goal to create a 100% transparent and locally sourced supply chain, in which we personally know every single touch point, from our suppliers to the individual machinists on the floor. Our yarn is produced close to our factory, which minimizes the transportation footprint and ensures EU environmental standards are met throughout production.
↳ - 80% USE OF WATER AND LESS CHEMICALS
Through the infusion of the color pigments directly into the polymer melt during spinning, our Dope Dye Process manages to use around 55% less energy, 80% less water, 77% less chemicals and produce around 20% less greenhouse emissions than conventional dyeing.
↳ KNITTED WITH 100% RENEWABLE ENERGY
In addition to water recycling and waste management, our socks are knitted using entirely renewable energy, 25% of which comes directly from our production’s own solar plant, with the remaining 75% being purchased from external renewable providers.