Patagonia LW Merino Performance Crew Fish Socks Size:M The heaviest base layer we

The heaviest base layer we make

Removable tray and Silicone PackAttic™ ensure the essentials stay organized

FABRIC TECH: SolarFlex® stretch fabric: 92% polyester/8% spandex

Complete with an adjustable lanyard for easy carry

The Thunderhead Lumbar is a fully waterproof pack built with your comfort and personal gear in mind

Patagonia LW Merino Performance Crew Fish Socks Size:M The heaviest base layer weLightly cushioned for comfort, our Merino Wool Blend Crew Socks are designed for a long life on the trail. They're made with Responsible Wool Standard (RWS) wool certified by Control Union (TE 00052557). We blend the RWS wool with nylon and spandex to create exceptional breathability, rugged durability, and excellent stretch and recovery that lasts the lifetime of the socks. The purchase of RWS certified products demonstrates demand for better animal