Expedition-Weight Insulation with Ultimate Versatility

The First Lite Furnace Zip-Off Boot Top is designed for hunters facing extreme cold and fluctuating temperatures, allowing you to add or remove base layers without taking off your boots. Built with Furnace EXP 350 Merino-X fabric, this heavyweight, high-loft merino wool base layer provides unmatched warmth, moisture-wicking, and odor resistance, keeping you warm and comfortable in freezing conditions.

The full-zip design allows you to easily shed layers without hassle, making it the perfect solution for cold mornings that turn into warm afternoons or long sits in freezing temperatures.

Key Features – First Lite Men's Furnace Zip-Off Boot Top

✔ Expedition-weight 350gsm Merino-X fabric – Superfine 20.5-micron merino wool with fleeced interior for extreme warmth
✔ Boot Top Cut – Designed to stop at the top of your boots to eliminate bunching
✔ Full-Length YKK Leg Zippers – Easily zip off without removing boots or pants
✔ Velcro waistband flap – Secures zipper for easy engagement
✔ Zipper slider anchored at bottom – Eliminates discomfort under a backpack belt
✔ Odor-resistant & moisture-wicking – Merino wool naturally controls scent and dries quickly
✔ Flatlock seams – Eliminates chafing for all-day comfort
✔ Fully functional fly – Convenient and practical for long sits

Temperature Rating:

• Below -7°C (20°F) – Designed for extreme cold-weather layering

Stay Warm, Stay Comfortable, Stay in the Hunt

From high-altitude backcountry hunts to frigid whitetail sits, the Furnace Zip-Off Boot Top provides the warmth you need and the versatility to adjust on the go—without the hassle of removing your boots.