The MTL Thermo Rogue 4 is the latest iteration of our elite winter hiker - our lightest, most athletic, most durable winter boot ever. Equipped with Vibram Arctic Grip underfoot with traction lugs and a lightweight, insulated Gore-Tex upper your foot will never lose traction and stay warm in the harshest conditions. Solarcore insulation inspired by NASA spacesuits takes our warmth technology to the next level.

Best for: Winter Hike
Insulation:
200 grams Primaloft® Gold Eco Series synthetic insulation, Merrell's best mid warmth boot option for winter days out on the trail. Solarcore® insulation with Aerogel provides over toe and underfoot superior warmth while being extremely flexible and ultra-thin.
Waterproofing:GORE-TEX® waterproof membrane, exceptional breathability and waterproof performance
Traction: Vibram® Arctic Grip™ All Terrain outsole designed to effectively extend the winter traction season, due to the enhanced durability and versatility. Vibram® traction lugs specifically designed to increase traction and shed debris with each step.

Special Features:
• Bellows tongue keeps out debris
• 3D Print and TPU overlays on upper in wear zones for increased durability
• Molded TPU heel counter for security
• Gaiter D-Ring
• Snowshoe strap ridge for stability
• Cleansport NXT™ treated for natural odor control
• Rock plate for protection

Materials:
• Ballistic mesh and TPU upper
• Metal hook and eyelets for added durability
• 100% recycled laces and webbing
• Breathable mesh lining
• 100% recycled mesh footbed cover
• 5% recycled removable PU footbed
• Two part, dual density FloatPro™ Foam midsole
• Vegan-Friendly

Additional Measurements:
• Half pair weight: 1lbs-4.09oz, 570g