How Kühler Works

Palm cooling that fits your training.

Kühler brings palm cooling into a rechargeable handheld device. Keep it beside your training equipment or courtside, and use it during breaks without preparing ice, water, or tubes.

Active thermoelectric cooling
Rechargeable via USB-C
Compact, handheld design
No ice, water, or tubing
Designed for use between efforts

Why cooling matters

Exercise produces metabolic heat. When heat production exceeds the body’s ability to release it, body temperature rises and thermal strain increases.

Managing that strain is an important part of training and competition, particularly during sustained effort or in hot conditions. Palm cooling is one approach being studied to support that process.

Explore the science behind palm cooling.

Chart of athletic performance in relation to core body temperature

How Kühler delivers cooling

A thermoelectric element cools the surface that contacts your palm. Heat moves from your hand into the device, while an internal heatsink and fan release heat into the surrounding air.

Kühler combines this cooling system with a patented handheld design, bringing palm cooling to the breaks you already take.

Built for practical use

Portable: Keep palm cooling close to your training area.
Simple setup: No ice, water, or tubing to prepare.
Rechargeable: Charge via USB-C between sessions.
Fits existing breaks: Use between sets, during timeouts, or while resting on the sidelines.