Reactiv™ Series
Take on Shifting Temps in the Reactiv™ Series
Choose from a variety of fabrics, styles, and features for the unisex Reactiv™ Series pieces that are right for you:
Adaptive Temperature Regulation. Graphene-infused yarn knit into a grid-faced fabric sits at the heart of the unisex Reactiv™ Series, retaining body heat when air turns cold and shedding it when output ramps up. The grid construction traps warm air in tiny pockets while leaving channels for moisture and excess heat to escape, which is why a single layer covers a wider temperature range than a flat-knit equivalent.
Built-In Odor Resistance. Graphene's natural antimicrobial properties keep these pieces fresh through long days and back-to-back wears. That matters when one quarter-zip has to bridge a frosty trailhead, a sweaty climb, and a coffee on the way home, and you'd rather not pack a backup.
Layer-Friendly Construction. Cut close enough to wear under a softshell or hardshell without bunching, but generous enough to move freely on its own. Thumb loops on select pieces seal sleeves under cuffs and gloves. Flat seams reduce pack-strap rub on long days under a load.
Range of Cuts. The unisex slice of the series covers crewneck tops, quarter-zips, full-zip hoodies, and bottoms, so you can build a head-to-toe baselayer-to-midlayer system on one fabric platform. The same series lives in men's and women's slices on their own division pages.
A Place in the Lineup. Where the Eclipser Series leans into protective shell layering and the Law Series anchors on technical fleece, Reactiv™ is the active midlayer built to keep your core temperature steady as conditions shift. Pair it with pieces from the Ski Collection for cold-weather days when you're alternating bursts of effort with downtime on the lift.
Look for signature touches like thumb loops to lock sleeves in place, a brushed interior face for next-to-skin warmth, a grid-knit outer face that breathes hard on the climb, and a fit cut for free movement under heavier outerwear.
Choose from a variety of fabrics, styles, and features for the unisex Reactiv™ Series pieces that are right for you:
Adaptive Temperature Regulation. Graphene-infused yarn knit into a grid-faced fabric sits at the heart of the unisex Reactiv™ Series, retaining body heat when air turns cold and shedding it when output ramps up. The grid construction traps warm air in tiny pockets while leaving channels for moisture and excess heat to escape, which is why a single layer covers a wider temperature range than a flat-knit equivalent.
Built-In Odor Resistance. Graphene's natural antimicrobial properties keep these pieces fresh through long days and back-to-back wears. That matters when one quarter-zip has to bridge a frosty trailhead, a sweaty climb, and a coffee on the way home, and you'd rather not pack a backup.
Layer-Friendly Construction. Cut close enough to wear under a softshell or hardshell without bunching, but generous enough to move freely on its own. Thumb loops on select pieces seal sleeves under cuffs and gloves. Flat seams reduce pack-strap rub on long days under a load.
Range of Cuts. The unisex slice of the series covers crewneck tops, quarter-zips, full-zip hoodies, and bottoms, so you can build a head-to-toe baselayer-to-midlayer system on one fabric platform. The same series lives in men's and women's slices on their own division pages.
A Place in the Lineup. Where the Eclipser Series leans into protective shell layering and the Law Series anchors on technical fleece, Reactiv™ is the active midlayer built to keep your core temperature steady as conditions shift. Pair it with pieces from the Ski Collection for cold-weather days when you're alternating bursts of effort with downtime on the lift.
Look for signature touches like thumb loops to lock sleeves in place, a brushed interior face for next-to-skin warmth, a grid-knit outer face that breathes hard on the climb, and a fit cut for free movement under heavier outerwear.
The Reactiv™ Series is KÜHL's active layering line built on graphene-infused grid fabric that warms when you stop and breathes when you go.
What is the Reactiv™ Series?
The Reactiv™ Series is KÜHL's active temperature-regulating layering line, built around graphene-infused grid fabric that retains or releases heat as your body demands.
The signature material is knit into a textured grid that traps warm air in small pockets when you cool down and channels moisture and excess heat out when you heat up. That two-way behavior is what separates Reactiv™ from a static fleece or baselayer. One piece adapts as your effort and the weather change through the day.
The signature material is knit into a textured grid that traps warm air in small pockets when you cool down and channels moisture and excess heat out when you heat up. That two-way behavior is what separates Reactiv™ from a static fleece or baselayer. One piece adapts as your effort and the weather change through the day.
What pieces are in the Reactiv™ Series?
The Reactiv™ Series covers tops, hoodies, and bottoms on a single grid-fabric platform.
On the unisex page you'll find crewneck pullovers, quarter-zips, full-zip hoodies, and pants, all sharing the same graphene-infused grid construction so they layer cleanly with one another. Gendered cuts of the same series live on the men's and women's division pages.
On the unisex page you'll find crewneck pullovers, quarter-zips, full-zip hoodies, and pants, all sharing the same graphene-infused grid construction so they layer cleanly with one another. Gendered cuts of the same series live on the men's and women's division pages.
Who is the Reactiv™ Series designed for?
The Reactiv™ Series is designed for active wearers whose body temperature swings hard during a day: backcountry skiers, alpine climbers, fast-paced hikers, trail runners, and anyone moving in shoulder-season conditions.
The fabric earns its keep on stop-and-go efforts: skin-track ascents and ski descents, summit pushes, dawn starts that warm into bright afternoons. If your effort and the air around you stay flat, a simple baselayer or fleece may serve you fine. Reactiv™ shines when neither stays still.
The fabric earns its keep on stop-and-go efforts: skin-track ascents and ski descents, summit pushes, dawn starts that warm into bright afternoons. If your effort and the air around you stay flat, a simple baselayer or fleece may serve you fine. Reactiv™ shines when neither stays still.
What fabrics and construction details define the Reactiv™ Series?
The defining fabric is a graphene-infused grid knit with a brushed interior face and an open grid outer face.
Graphene conducts heat, so the fiber actively moves warmth around the garment rather than just trapping it. The grid construction creates insulating air pockets while leaving channels open for moisture-wicking and quick-dry venting. Practical features include thumb loops to lock sleeves under cuffs, a close-but-not-tight cut for layering, flat seams to reduce chafe and pack-strap rub, and built-in odor resistance from the graphene itself.
Graphene conducts heat, so the fiber actively moves warmth around the garment rather than just trapping it. The grid construction creates insulating air pockets while leaving channels open for moisture-wicking and quick-dry venting. Practical features include thumb loops to lock sleeves under cuffs, a close-but-not-tight cut for layering, flat seams to reduce chafe and pack-strap rub, and built-in odor resistance from the graphene itself.
How does the Reactiv™ Series compare to KÜHL's other series?
Reactiv™ is the active-layering specialist in the lineup, not a shell, not a casual midlayer.
Where the Eclipser Series focuses on weatherproof shell construction and the Law Series leans on plush technical fleece for sustained warmth, Reactiv™ is built to swing both directions: warm when you stop, breathable when you go. If you only ever move at one pace, another series may fit better. If your day has gear changes, Reactiv™ is the one piece that may need to come off least.
Where the Eclipser Series focuses on weatherproof shell construction and the Law Series leans on plush technical fleece for sustained warmth, Reactiv™ is built to swing both directions: warm when you stop, breathable when you go. If you only ever move at one pace, another series may fit better. If your day has gear changes, Reactiv™ is the one piece that may need to come off least.
What weather and conditions does the Reactiv™ Series handle best?
The Reactiv™ Series performs best in cold-to-cool conditions with variable output: roughly 20°F to 55°F when you're working hard, layered higher when you're not.
Think skin-track-to-summit, dawn-to-noon temperature swings, and the in-between weeks of fall and spring when one layer has to do the work of two. For deep cold or sustained downtime on the lift, build the series into a system with pieces from the Ski Collection. For most active winter and shoulder-season days, a Reactiv™ top under a softshell is the full kit.
Think skin-track-to-summit, dawn-to-noon temperature swings, and the in-between weeks of fall and spring when one layer has to do the work of two. For deep cold or sustained downtime on the lift, build the series into a system with pieces from the Ski Collection. For most active winter and shoulder-season days, a Reactiv™ top under a softshell is the full kit.
