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Winter Hits. Merino Runs. Discover icebreaker’s natural collection for winter running.

From the first breath to the final push, merino keeps pace.

The runs that matter don’t wait for better weather. They start in the dark, cut through cold air, and build momentum with every step. In winter conditions, comfort isn’t a luxury – it’s essential. That’s where merino comes into its own.

For FW26, icebreaker presents its winter running collection engineered to help runners stay comfortable across changing temperatures, intensities, and conditions. Combining the natural performance of merino with body-mapped construction and technical design, the collection delivers breathable warmth, efficient temperature regulation, and unrestricted movement from the first kilometer to the last.

Warm when you step out. Breathable as the pace rises. Adaptable throughout the run. Because when conditions change, your layers should respond.

icebreaker’s ZoneKnit™ Technology

Merino, mapped to your run.

Not every part of the body works the same way, and neither should your base layer.

icebreaker’s ZoneKnit™ technology combines the natural benefits of merino wool with strategically placed ventilation zones that increase airflow where heat builds and retain warmth where it’s needed most. The result is balanced comfort that adapts to changing efforts, helping runners stay focused from steady training sessions to race-day performance.

Whether you’re pushing uphill, settling into tempo pace, or logging winter miles, ZoneKnit™ supports temperature regulation every step of the way.

Key Styles

125 ZoneKnit™ Base Layer

A lightweight next-to-skin layer designed to regulate body temperature in cold-weather conditions while providing the softness and comfort of naturally breathable merino.

Merino Speed Winter 28″ Tights

Technical winter running tights built for cold conditions, balancing warmth, breathability, and freedom of movement throughout every run.

125 ZoneKnit™ Speed 6″

Lightweight performance shorts featuring targeted ventilation zones and natural temperature regulation for high-output efforts year-round.

200 RealFleece™ Descender Mid Layer: Warmth without the bulk

When temperatures drop, runners need insulation that works with them—not against them.

The 200 RealFleece™ Descender is built for movement, combining authentic brushed merino fleece with breathable ventilation that helps release excess heat as effort increases. Soft, lightweight, and completely plastic-free, it provides the warmth needed for winter training without adding unnecessary bulk.

Designed as the ideal mid-layer for cold-weather running, it delivers comfort that moves naturally with the body.

The Micro Hydro: now available in three sizes!

Hydro Flask has been an icon in the world of drinkware for years. Known for its rugged design, excellent insulation and fresh colours, the brand has built a loyal following around the world. With the introduction of the 200 ml Micro Bottle last year, the familiar Hydro Flask formula suddenly came in a surprisingly small package. And that compact size proved to be a real hit.

Small but mighty

The Micro Bottle quickly became a true hype in the United States. After years in which bottles and tumblers seemed to get bigger and bigger, a clear countertrend emerged: small is beautiful. The Micro Bottle literally fits into a jacket pocket, handbag or lunchbox, making it not only a practical bottle, but increasingly a lifestyle accessory too.

On social media, the bottle regularly appeared alongside mini bags, keychains and other ‘tiny accessories’. Demand became so strong that several colours repeatedly sold out.

Despite its small size, the Micro Bottle delivers the same quality you would expect from Hydro Flask. Thanks to its double-wall vacuum insulation, drinks stay hot or cold for hours, while the leakproof and durable design makes it ideal for everyday use.

Two new sizes

Following the success of the original 200 ml version, Hydro Flask is now expanding the Micro Bottle range with two new sizes: 300 ml and 400 ml. The compact character remains, but the additional sizes offer more choice for different moments throughout the day — from a small coffee on the go to a little extra hydration during a busy day.

The larger versions also feature a practical Flex Clip, making it easy to attach the bottle to a bag, for example.

In a short period of time, one of Hydro Flask’s smallest products has grown into a complete family.