The socks in the Challenge series provide maximum comfort while providing the proper compression for improved blood circulation.

Its fibers combination incorporates Meryl Polyamide which provides unique characteristics in terms of lightness, softness, strength and breathability.

A seamless design that reinforces the areas of greatest impact to prevent blisters and chafing.


Size Guide

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  • The dual compression system improves blood circulation.
  • The differentiated structure in the upper and instep increases comfort.
  • The combination of fibers favours thermoregulation in any type of activity.
  • The regulation provided by the silver ions prevents the development of unpleasant odours.
  • Reinforced with terry cloth inserts for extra cushioning during use.
  • Designed and manufactured in Spain following the strictest quality standards.

State-of-the-art technical fibers manufactured in Italy with OEKO TEX certification.

Composition & care



60% Polyamide 6.6 – 27% Elastane – 11% Lycra – 2% Nylon.

  • Maximum wash temperature 30º.
  • Do not use bleach
  • Do not iron
  • Do not tumble dry
  • Do not dry clean
  • Wash dark colours separately
  • Dry in the shade

Our commitment

We manufacture our garments with the latest generation of recycled and sustainable technical fabrics. Our clothes are made from plastic bottles, carpets, fishing nets or discards from textile production.

We work with trusted suppliers and manufacturers and we design and produce all our garments and accessories in Spain and Portugal. This ensures that they meet the highest quality standards and are certified and compliant in terms of sustainability and good treatment of their workers.

If you would also like to know more about the way we work, please click here

Shipping and returns

  • Free shipping to mainland Spain and the Balearic Islands on purchases over 60 euros.
  • After placing your order it will take us 24 hours to prepare it for shipment.
  • We accept returns within 30 days of delivery of your order.
  • Processing returns is quick and easy, find a complete guide by clicking here

Size Guide


Training socks are generally divided into different size ranges, which may vary depending on the brand. Once this is clear, you just need to choose the size that matches your shoe size.

Nevertheless, if your size is in between two sizes, the best option would be to pick the smaller pair. For any physical activity, it is preferable to have a tight fit than a wide one.

UE37 - 4041 - 4445 - 48
UK4.5 - 67 - 910 - 12.5
US5 - 78 - 1011 - 13
cm23.5 - 2526 - 2829 - 31.5