The Arc’teryx Women’s Kyanite Baselayer Zip-Neck is a mid-weight, next-to-skin layer engineered to balance thermal insulation, breathability, and stretch for cold-weather outdoor pursuits. It sits between lightweight base layers and heavyweight insulating garments, making it particularly well-suited for fall and winter activities where temperature control and moisture management are critical. Built from Polartec® Power Stretch® Pro, the fabric features a durable nylon outer face paired with a soft, brushed interior that traps heat close to the body while wicking moisture away. The four-way stretch construction supports dynamic movement across varied activities such as alpine approaches, backcountry skiing, winter hiking, and mountain travel. The zip-neck design allows the wearer to modulate ventilation on the go; a partially open zipper can quickly release heat during high-output efforts without sacrificing warmth at the core. The cut is form-fitting and streamlined, designed to layer seamlessly under jackets, shells, and midlayers without bulk. Articulated seam lines and flatlock stitching help minimize chafing and allow a natural range of motion through the shoulders and torso. The fabric’s quick-dry properties help reduce chill during periods of rest or lower activity, making the Kyanite Baselayer Zip-Neck a versatile choice across a wide range of cold-weather conditions. Unlike outerwear, this piece is not weatherproof on its own; it performs best as part of a layering system. By combining stretch, moisture management, and mid-weight insulation, the garment helps regulate body temperature whether you’re climbing alpine ridges, logging winter miles, or simply navigating cold, variable climates.

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