The Icebreaker Merino Women's Oasis Long Sleeve Thermal Base Layer is a heavyweight, half-zip top engineered for cold-weather comfort. Crafted from heavyweight merino wool, it offers natural temperature regulation and reliable odor resistance so you stay comfortable and fresh during extended use.

With a regular fit designed for layering, the Oasis slips easily under mid layers or outer shells. The half-zip collar provides quick, adjustable ventilation while long sleeves deliver full-coverage warmth for winter activities.

• Heavyweight merino wool for warmth, breathability and moisture management
• Half-zip design for simple temperature control on the move
• Regular fit that layers comfortably beneath mid or outer layers
• Natural odor resistance for multi-day wear

Perfect for skiing, camping, hiking or everyday cold-weather wear, this thermal base layer combines natural-fiber performance with versatile styling for reliable warmth on your winter adventures.