Thermoball Insulated Jacket – Men's

When cold-weather miles demand warmth without the weight, the Thermoball is our go-to insulated layer for runners and hikers who move fast and pack light. Synthetic ThermoBALL clusters trap heat even when wet, so humid Southern mornings won't shut you down. It stuffs into its own chest pocket — ready to stash mid-run or pull out when temps drop.

• ThermoBALL synthetic insulation retains warmth even when wet — a reliable edge over down in the South's damp, variable conditions
• Packs into its own chest pocket for quick stashing mid-run or on the trail without eating up pack space
• Full-zip construction with secure pockets keeps essentials accessible and protected from wind chill
• Works as a standalone layer in mild cold or as a mid-layer under a hardshell when temps really bite
• Available in TNF Black — versatile enough to pair with any kit and forgiving enough to hide trail grime