REI Co-op  COOLMAX EcoMade Lightweight Tech Hiking Quarter Socks

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With a sport-style fit that stays put through sudden stops and starts, the REI Co-op COOLMAX EcoMade Lightweight Tech quarter socks are cool and breathable.


  • The polyester yarn in COOLMAX® EcoMade fabric comes from recycled water bottles
  • Seamless toe construction helps prevent chafing
  • Spandex yarn wraps foot for arch support
  • Stretch nylon provides durability; spandex yarns improve fit
  • Reinforced heels, toes, Achilles and footbed stand up to wear and tear
  • Made to reflect our love for people and the planet through the use of recycled polyester, which keeps waste out of landfills
  • REI is Climate Neutral Certified; as we work to actively reduce our footprint, we measure annual carbon emissions and purchase an equivalent amount of verified carbon credits
  • Made in USA with imported and domestic yarns

Made in USA.

View all REI Co-op Men's Hiking Socks

Technical Specs

Item #165387
Best Use



77% COOLMAX EcoMade polyester/22% nylon/1% spandex

Sock Height


Sock Cushioning

Light Cushioning

Quick Drying


Moisture Wicking





Contains recycled materials

From a Climate Neutral Certified brand

Size Chart

U.S. Men's5.5-8.59-1212.5-145.5-8.59-14
U.S. Women's4-6.57-9.510-12.54-9.510-12.5

Sizing Notes

For socks, please use shoe size.

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