Patagonia

Merino 4 is a reliable companion when the destination remains unknown. Our warmest merino layer, it offers the best option for cool to very cold weather. Naturally soft and beautiful, it's made with 7.8-oz 100% merino wool that has a dense jersey-knit face for thermal efficiency and resilience and a terry-loop back for next-to-skin comfort. Merino naturally resists odor, moves moisture away from the skin, regulates body temperature, and stretches. Features include a smooth self-fabric collar, set-in sleeves and offset shoulder seams, and overlock seams for a clean aesthetic. We slow-wash our merino for next-to-skin softness. Machine-wash cold; lay flat to dry. Recyclable through the Common Threads Recycling Program.
Features:
- Dense jersey-knit face for thermal efficiency and resiliency, fine 18.5 micron gauge yarn and terry-looped back for next-to-skin comfort
- Machine-wash cold and lay flat to dryW.8-oz (265-g) 100% chlorine-free merino wool. Recyclable through the Common Threads Recycling ProgramS20 g (11.3 oz)
- Made in USA.
- Merino wool resists odor naturally, insulates even when wet, is exceptionally durable and stretches – providing superior performance and softness
- Self fabric collar provides full protection
- Set-in sleeves for better fit within layering systems
- Wide double layer self fabric cuffs stay in place when pushed up
Backcountry.com

Go au naturale when it comes to wicking, insulating baselayers with the Patagonia Men’s Merino 4 Classic Crew. Equally at home on the street as it is under three layers of ski clothing, the Merino 4 Crew is made from nothing but soft, stretchy, chlorine-free merino wool. Merino’s odor-fighting, quick-drying properties make it ideal for mountaineering, ski touring, and any other cold, stop-and-go pursuit.