Women's Classic Thermal Merino Base Layer Crew Boxed

100% Merino 250 Midweight Wool. Unmatched Thermal Regulation & Itch-Free Comfort.

As the benchmark for cold-weather mountain insulation, this 100% Merino wool top delivers unmatched thermoregulation, moisture management, and natural odour resistance on freezing resort days and deep-backcountry tours. Engineered as a true midweight base layer, it insulates your core in deep freezing conditions while remaining exceptionally breathable when your body temperature rises on steep ascents.

• 100% Merino 250 Interlock Fabric: Smartwool’s heaviest 100% Merino wool knit fabric delivers maximum insulation, breathability, and next-to-skin softness in sub-zero weather.

• Chafe-Free Flatlock Seams: Flat-stitched seam construction eliminates skin irritation and friction points during high-output movement.

• Offset Shoulder Panels: Top shoulder seams are removed so backpack, harness, and hydration straps rest comfortably without pressure spots.

• Body-Contoured Athletic Fit: Back body seams wrap seamlessly to the front to create a flattering silhouette that moves naturally with your body.

• Natural Odour Control: Pure Merino wool fibers naturally resist bacteria growth, keeping you fresh through multi-day hut trips and travel days.

• Moisture & Temperature Control: Absorbs vapor and wicks wetness away from skin before condensation forms, keeping you dry and preventing post-exercise chills.

• Boxed Presentation: Neatly packaged in Smartwool's retail box, making it an ideal gift option or organized addition to your winter kit.

Why the Attridge Staff Chooses Merino

"Our staff almost exclusively choose Merino wool for their base layer. Its secret weapon isn't just how warm it keeps you on sub-zero mornings—it's Merino's incredible ability to self-regulate and dump excess heat the moment you start charging hard, hiking the ridge, or lapping the park. You stay in that perfect thermal sweet spot all day without overheating or getting that cold, clammy synthetic chill on the chairlift ride back up. Once you ride in pure Merino, you'll never go back."