A handheld tool that pulls heat from your body between efforts, so your output holds from the first effort to the last.
KYLA Performance is a pair of patent-pending heat-transfer tools, one for each palm.
See KYLA Performance01 / THE MOMENT
The space where heat builds, output starts to drop, and the next effort is being shaped before it begins.
Most athletes treat this moment as waiting. KYLA treats it as work.
WHO IT'S FOR
HYROX, CrossFit, combat sports, track. Built for the rest between rounds, with capacity for a full session.
Intervals, sets, circuits. The next set should feel like the first. Chill it, hold it, go again.
Heat doesn't care what level you're at. Cooling between efforts works for everyone.
02 / ATHLETES
A selection of the first 50 athletes testing KYLA before launch.
HYROX·Swedish Record Holder in HYROX Pro Single & Pro Double.
Read full story →"I use KYLA between sets to accelerate recovery and keep my output high throughout the session"
OUTPUT
5 to 12% sustainable output gain
From our testing pool of 50 athletes. Kenny's HYROX sessions are part of the data.
How we tested this →HYROX·Elite 15 Athlete and Performance Coach
Read full story →"Using KYLA, I've noticed several significant positive changes in my training. Better repeatability between intervals, more stable output, and faster recovery between hard efforts."
RECOVERY
Up to 50% deeper heart-rate recovery between efforts
Measured across our testing pool of 50 athletes. Pelayo is one of them.
How we tested it →Running·1500m in 3:41 & 10k in 29:30
Read full story →"I ran quicker than usual with measurably lower lactate. Heart rate was the same. The feeling was different, like the same work cost less. I do this session three times a week, so I trust the comparison."
FATIGUE
Up to 25% lower blood lactate at matched pace
Measured in Jeppe's treadmill threshold sessions, against his own weekly baseline.
How we tested this →
FOLLOW THE BUILD
03 / THE MECHANISM
Across repeated efforts your core heats up, and your body starts spending capacity on cooling instead of output. That is the fade you feel. KYLA pulls heat out in the rest between efforts, so the next effort starts closer to full.
Heart rate recovery degrades across an unaided session. KYLA holds it consistent. View methodology
The science behind itUSING KYLA BETWEEN SETS
Five sets. Same weight, same rest. The difference shows up late, where it matters most.
Illustrative session modelled from our testing pool data.
See how we tested this04 / THE DIFFERENCE
Cold objects feel cold, but they move heat out of the body too slowly to matter. KYLA is engineered around the rate of transfer, drawing heat continuously for the length of a real rest.
How heat transfer works →
05 / THE SCIENCE
Your palms release heat several times faster than almost any other surface of the body. That pathway is documented in decades of thermoregulation research, and it is the pathway KYLA is engineered around. We did not invent the science. We built the tool that uses it between efforts.
06 / THE TOOL
Full refund anytime until 30 days after delivery.
See how we tested it →07 / THE BUILD
More than forty complete builds. Fifteen factories tested for parts most people will never see.
Almost every component is bespoke, from the metals and polymers to the phase-change materials at the core, most used in ways nobody had tried before. Designed in Stockholm, Made in Germany.
08 / RESERVE
Quick answers to the most common questions about KYLA Performance. For more, see the full FAQ.
During training, heat builds in your working muscles and core. As internal temperature rises, your body shifts capacity from output to heat management, and performance starts to drop before you feel it.
KYLA Performance is used during rest periods between efforts. Held in the palm, it draws heat out of the body through the palms, which contain a dense network of specialised vessels designed specifically for releasing heat. Core temperature stays steadier across the session. Output holds longer across repeated efforts.
Athletes who train with repeated high-intensity efforts. HYROX, strength training, intervals, functional fitness, running, cycling, rowing. Anywhere heat builds across a session and rest periods exist between efforts. The harder the session, the more measurable the effect.
Pre-cool KYLA Performance in your refrigerator overnight, or for a minimum of three hours before training. Bring it to the gym in the dust bag. Hold one in each palm between efforts: between sets, between intervals, between rounds. Most athletes feel an effect within thirty seconds.
No. Heat transfer depends on the conductivity of the material in contact with your skin, not temperature alone. KYLA Performance is engineered for high heat transfer rate, holding a temperature between 13 and 15°C, the zone where heat extraction is most efficient. The goal is not maximum cold. It is maximum heat transfer.
Shipment June 2026. First run of 1,000 units. Full refund anytime before shipment.
KYLA Performance is covered by a two-year warranty against manufacturing faults. If something stops working as it should, contact support and we will replace it.