The Difference is Reactiv™
Sofie™ Sweater
Women's Reactiv™ Series
Move Through Shifting Conditions in the Women's Reactiv™ Series
Built around graphene-infused fabric that adapts to your body's needs, the women's Reactiv™ Series is engineered for active days where the weather refuses to commit. The series spans multiple divisions. This page covers the women's slice, a focused lineup of layering pieces built on the same temperature-regulating platform.
Choose from a variety of fabrics, styles, and features for the women's Reactiv™ Series pieces that are right for you:
Adaptive Grid Construction. Lightweight grid-knit construction reduces weight while increasing breathability. The graphene-infused yarn carries heat away from hot zones and holds it where you need it, so you stay regulated through pace changes and pauses on the trail.
Active Layering Tops. The series' full-zip and quarter-zip tops anchor a layering system. Soft, next-to-skin comfort makes them wearable straight against the skin, and built-in odor resistance keeps multi-day trips honest. Thumb loops keep sleeves in place when an outer layer goes on.
Hoody Coverage. A grid full-zip hoody adds head-and-neck coverage for shoulder seasons and breezy alpine starts. The brushed interior holds warmth without the bulk of traditional fleece, and the slim profile slides easily under a shell.
Lightweight Bottoms. The grid bottom pairs with the tops for a complete baselayer system. The same graphene-infused yarn moderates leg temperature on long mileage days. 4-way stretch keeps stride length honest on technical terrain.
Where It Fits in the Lineup. Reactiv™ is the women's series to reach for when adaptability matters more than maximum insulation. For deeper cold and sherpa-lined warmth, see our Dani Sherpa Series. For the other end of the temperature spectrum, our women's summer collection covers warm-weather performance pieces.
Look for the signature touches that define the series: thumb loops to seal sleeves under outer layers, a brushed interior for next-to-skin softness, and a slim, layer-ready cut across every piece.
Built around graphene-infused fabric that adapts to your body's needs, the women's Reactiv™ Series is engineered for active days where the weather refuses to commit. The series spans multiple divisions. This page covers the women's slice, a focused lineup of layering pieces built on the same temperature-regulating platform.
Choose from a variety of fabrics, styles, and features for the women's Reactiv™ Series pieces that are right for you:
Adaptive Grid Construction. Lightweight grid-knit construction reduces weight while increasing breathability. The graphene-infused yarn carries heat away from hot zones and holds it where you need it, so you stay regulated through pace changes and pauses on the trail.
Active Layering Tops. The series' full-zip and quarter-zip tops anchor a layering system. Soft, next-to-skin comfort makes them wearable straight against the skin, and built-in odor resistance keeps multi-day trips honest. Thumb loops keep sleeves in place when an outer layer goes on.
Hoody Coverage. A grid full-zip hoody adds head-and-neck coverage for shoulder seasons and breezy alpine starts. The brushed interior holds warmth without the bulk of traditional fleece, and the slim profile slides easily under a shell.
Lightweight Bottoms. The grid bottom pairs with the tops for a complete baselayer system. The same graphene-infused yarn moderates leg temperature on long mileage days. 4-way stretch keeps stride length honest on technical terrain.
Where It Fits in the Lineup. Reactiv™ is the women's series to reach for when adaptability matters more than maximum insulation. For deeper cold and sherpa-lined warmth, see our Dani Sherpa Series. For the other end of the temperature spectrum, our women's summer collection covers warm-weather performance pieces.
Look for the signature touches that define the series: thumb loops to seal sleeves under outer layers, a brushed interior for next-to-skin softness, and a slim, layer-ready cut across every piece.
The women's Reactiv™ Series is a graphene-infused, temperature-regulating layering system built for active days where conditions shift fast.
What is the Reactiv™ Series?
The Reactiv™ Series is a KÜHL layering system built on graphene-infused fabric that adapts to your body's heat output in real time. The yarn pulls warmth away from hot zones and holds it in cooler ones, so a single layer covers a wider temperature range than a typical baselayer or grid fleece. The series spans multiple divisions. This page covers the women's pieces, which share the same fabric platform across tops, a hoody, and bottoms. For a warmer, fleece-forward alternative, see our Vantage Series.
What pieces are in the Reactiv™ Series?
The women's Reactiv™ Series includes full-zip and quarter-zip tops, a full-zip hoody, a crew top, and grid bottoms. Each piece uses the same graphene-infused grid construction, so they layer cleanly together as a system or work individually under a shell. The tops and hoody anchor the upper-body layer. The grid bottom completes the kit for cold-start hikes, ski tours, and chilly trail mornings.
Who is the Reactiv™ Series designed for?
The Reactiv™ Series is designed for active women who deal with shifting temperatures inside a single outing: climbers, hikers, skiers, runners, and travelers who can't change layers every twenty minutes. The graphene-infused fabric does some of that regulating work for you, so you can stay focused on the route instead of stopping to shed or add a layer. It's a strong fit for shoulder-season trails, alpine starts, and mixed-pace days where you sweat on the climb and cool fast at the top.
What fabrics and construction details define the Reactiv™ Series?
Graphene-infused yarn in a lightweight grid knit is the defining feature. Graphene conducts heat efficiently, so the fabric moves warmth toward cooler areas and away from hot ones rather than just trapping it like traditional fleece. The grid construction adds breathability and shaves weight. Other details include a brushed interior for next-to-skin softness, built-in odor resistance for multi-day wear, thumb loops on long-sleeve pieces, and 4-way stretch on the bottoms for unrestricted stride.
How does the Reactiv™ Series compare to KÜHL's other series?
Reactiv™ sits in the technical-baselayer-and-active-mid slot. Where heavier fleece series lean on sherpa or thick knits for pure warmth, Reactiv™ uses a thin grid-knit construction that adapts to your output. Our broader Aktive Collection groups movement-focused pieces across multiple fabrics and weights, including Reactiv™ tops and bottoms. Choose Reactiv™ when you want a thin, adaptive layer that does the temperature-regulating work for you, rather than a thicker piece that simply insulates.
What weather and conditions does the Reactiv™ Series handle best?
The Reactiv™ Series handles best in the 30-55°F range and in any conditions where your output swings: uphill climbs followed by descents, fast hikes that turn into windy summit breaks, ski tours, cool-weather running, and shoulder-season travel. It's not a deep-cold insulation layer on its own. It's the thinking layer that lives between your skin and your shell. Under a hardshell on a wet day or over a baselayer at altitude, it adapts to what your body is doing.
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