Outdoor Research Frostline Hat accessories two J-zip side pockets put

two J-zip side pockets put essentials within reach on the move

around camp

Zigzag-knit construction maximizes airflow through the fabric and packs down small enough to stuff in a vest pocket

Quick-dry webbing and an adjustable bungee system mean you're back moving fast

secure fit — ideal for climbers dialing in their first performance shoe or adding a versatile option to the rack

Outdoor Research Frostline Hat accessories two J-zip side pockets putBuilt for hard winter conditions mountaineering, ski approaches, or bitter cold backcountry work the Frostline is our pick when temps drop and wind picks up. A Pertex Shield shell blocks wind and moisture while the Posh Pile fleece lining delivers real warmth fast. The zip out face mask and fold down earflaps let you dial protection to the conditions. Pertex Shield 2L 30D ripstop nylon shell sheds wind and moisture without trapping heat Posh Pile 100%