CoolMax 4167
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CoolMax 4167

Regular price £20.00
Regular price Sale price £20.00
Tax included.
Sex: Male
Size: Small
Description

Limited Edition Red On Back Yard Ultra Coolmax® Socks – 4.167

Celebrate the toughest race format on the planet with our limited edition Red On Back Yard Ultra socks, featuring the famous 4.167 in dark green across the front.

Built with Coolmax® technology, these ultra-lightweight yet supportive socks keep your feet cool, dry, and comfortable no matter how far you push. The multi-channel fibres wick away sweat fast, while the slightly higher calf fit offers extra coverage for endurance days.

From first loop to last, these socks are made to perform. Once they’re gone, they’re gone.

Key Features

  • Limited Edition Back Yard Ultra design with 4.167 detail

  • Coolmax® moisture-wicking fabric for dry, fresh feet

  • Breathable, lightweight, and quick-drying

  • Slightly higher calf fit than our standard crew socks

The Science of Coolmax®

Coolmax® socks are made from a specially engineered polyester-based fabric designed to optimise moisture management and breathability, making them a top choice for high-performance sport and everyday wear.

Fibre Structure
Coolmax® fibres have a multi-channeled cross-section that increases surface area compared to traditional round fibres.

  • Function: These channels pull moisture away from the skin and move it to the outer surface of the fabric.

  • Benefit: Faster evaporation keeps your feet dry and fresh for longer.

Moisture Wicking
Coolmax® works through capillary action rather than absorption.

  • The unique fibre structure draws moisture along its channels using surface tension, moving it efficiently to the surface.

  • This keeps your feet comfortable and dry even during intense effort.

Thermoregulation
By promoting quick evaporation, Coolmax® supports your body’s natural temperature regulation.

  • In the cold, dry skin retains warmth more effectively.

  • In the heat, evaporation cools you down.

Durability and Comfort
Thanks to its polyester base, Coolmax® fabric delivers:

  • A lightweight feel

  • Durability for long-term wear

  • Quick-drying performance
    Often blended with spandex or nylon for added stretch and a secure fit.

Summary
The Limited Edition Red On Back Yard Ultra Coolmax® Socks combine performance-driven technology with event heritage. The 4.167 detail marks your connection to one of the toughest endurance formats on the planet, while the Coolmax® fabric works to keep you cool, dry, and ready for anything.

Care & Materials

58% MicroPolyester, 37% TC Cotton, 3% Rubber, 1% Spandex, 1% Nylon

Machine Wash Cold.

Do not Bleach. Tumble Dry Low

Performance Enhancing

Discover the science behind the socks

Discover all the secrets and science that go into the socks.

Developed by Elite Coaches.
Worn by Elite Athletes.

Attributes Visualiser

  • Thickness: 2
  • Breathability:
  • Comfort: 5
  • Versatility: 3