First Lite Men's Kiln Zip-Off Long John - Dry Earth

Beat big temperature swings without pulling your boots. The First Lite Kiln Zip-Off Long John uses full-length side zippers so you can add or shed your merino base layer on the move—no awkward trail-side wardrobe change required. Built with midweight 250 gsm Merino-X and 37.5® Active Particle Technology, these bottoms insulate in the cold, breathe on the climb, and dry fast to keep you comfortable from frosty dawn to sunny midday.

Thoughtful details make them a hunter favorite: the zipper initiates easily from the top, a Velcro waistband flap helps you engage the zip quickly with cold hands, and the slider parks at the ankle to keep hip-belt hotspots to a minimum. A next-to-skin fit, flatlock seams, and a soft jacquard waistband finish a low-bulk layer that disappears under your pants but pays off in all-day comfort.

Key Features

• Full-length YKK side zippers for fast on/off without removing boots or bibs
• Velcro waistband flap and top-start zipper for easy engagement with gloves
• Zipper slider anchors at the ankle to reduce pressure under a pack hip belt
• 250 gsm Merino-X fabric balances warmth, breathability, and durability
• 37.5® technology helps exhaust moisture and regulate core temperature
• Interlock knit for high-loft insulation and efficient moisture management
• Next-to-skin athletic fit with flatlock seams to reduce chafing
• Jacquard waistband and fully functional fly

Specs & Sizing

• Layering position: next to skin
• Material: 250 gsm Merino-X (17.5 micron merino) with 37.5®
• Cut: athletic
• Actual weight: 12 oz
• Temperature range: 20°F – 60°F (layer to conditions)
• Care: machine wash, line dry
• Color: Dry Earth

Best For

• Western hunts with cold starts and warm afternoons
• Whitetail sits where the hike in overheats standard long johns
• Any mid to late-season kit needing fast, silent thermal adjustment

Stay warm when you need it, dump heat when you don’t—Kiln Zip-Off Long Johns deliver boot-on versatility without sacrificing merino performance.