Designed for women who enjoy snow sports, this merino wool zip-up top is ideal for those seeking a high-performance base layer for skiing, snowshoeing, or any demanding winter activity.Icebreaker’s Winter 2027 collection features this technical base layer with a warmth rating of 260, crafted from 18.9-micron pure merino wool, with a slim fit designed to layer easily under other garments.

The Icebreaker M 260 Vertex LS HZ Chillwave Zip-Up Top, a technical base layer made from 100% merino wool

The all-merino wool construction (excluding embellishments) gives this top natural thermoregulatory properties: it keeps you warm in cold weather and wicks away excess body heat during intense activity. The fine 18.9-micron fiber feels soft against the skin and is naturally odor-resistant, which extends the time you can wear it between washes, even on long outings. Weighing 320 g for a size M, it’s a substantial piece, consistent with the brand’s stated warmth rating of 260.

A half-zip and seams designed for mobility in winter conditions

The half-zip at the collar allows you to quickly adjust ventilation without having to remove the layer. On the slopes or while climbing, this ventilation option prevents overheating without exposing the torso to the cold. The slim fit is complemented by underarm gussets that preserve shoulder mobility, which is particularly useful during the wide, sweeping movements typical of skiing. Flatlock seams and side seams shifted toward the back reduce friction points, thereby limiting irritation during prolonged wear under technical gear. The offset shoulder seams contribute to the same goal of comfort while wearing the jacket.

A Natural Material with Tangible Environmental Benefits

The merino wool used is an annually renewable fiber, free of plastic microfibers and petrochemical-based synthetics. It is naturally recyclable and biodegradable under certain conditions, making it a responsible choice for athletes concerned about the environmental impact of their gear. Care instructions: Machine wash cold on a delicate cycle, without fabric softener or tumble drying, to preserve the fiber’s properties over the long term.