Find functional yet comfortable mid layers at icebreaker. Part of our unique layering system, our merino wool mid layers breathe when you want it and insulate body heat when you need it. Our mid layer fleece jackets are perfect for warmth and comfort. With multiple styles and colors, there's something for every activity and every sense of style. Whether you're heading out for a quick run or going on a hike, icebreaker's merino wool mid layers are perfect for cooler weather and winter temperatures. Try pairing our merino wool mid layers with a lightweight t-shirt and vest for brisk fall days or layer them over one of our merino wool dresses for the perfect fall look. Be sure to also check out our collection of outerwear, baselayers, and socks to complete your layered winter wardrobe.
icebreaker weighting system. The larger the number the warmer the garment.
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The bigger the number, the warmer you'll be.

From summer heat to winter chill, there's a fabric weight to keep you in your comfort zone.

320 - 380 Heavyweight - Built to keep out the coldest conditions.

240 - 280 Midweight - Best suited for cold conditions.

200 - 230 Lightweight - Best suited for moderate to cool conditions.

150 - 180 Ultralight - Versatile all season performance.

120 - 135 Featherweight - Best for warm to hot conditions.