X-BIONIC Base layers

Find Clothing from X-BIONIC for outdoor

Unlock your ultimate outdoor potential with X-BIONIC, the global leader in high-performance functional apparel, now available at trekkinn. Born from rigorous scientific research and perfected with Swiss precision, X-BIONIC doesn´t just create clothing; it engineers intelligent systems designed to work in harmony with your body, turning your own sweat into a performance-enhancing tool.

At the core of your outdoor layering system is the most critical piece: the base layer. This is where X-BIONIC truly revolutionizes the experience for every trekker, hiker, and mountaineer. Forget the limitations of traditional thermal underwear that quickly becomes damp and cold. X-BIONIC base layers are sophisticated instruments for thermoregulation, built to maintain your optimal core body temperature of 37°C, no matter the intensity of your activity or the unpredictability of the weather.

The secret lies in patented, award-winning technologies. The legendary 3D Bionic Sphere® System with ThermoSyphon® technology is a masterpiece of engineering. During strenuous ascents, this intricate structure doesn´t just wick moisture away; it uses it to create a tangible cooling effect on your skin, preventing overheating and saving precious energy. When you pause for a rest or the temperature drops, the system’s complex inner channels trap warm air, creating an insulating buffer that protects you from the cold. This means you stay comfortable, powerful, and focused, whether you´re pushing for a summit or setting up camp.

Furthermore, many X-BIONIC base layers incorporate Partialkompression®, a groundbreaking form of compression that applies targeted pressure without neglecting skin cooling. This technology reduces muscle vibration, improves the supply of oxygen and nutrients to your muscles, and accelerates recovery times. The result is less fatigue on multi-day treks and more stamina for that final mile.

Designed for the dedicated outdoor enthusiast, our selection of X-BIONIC for men and women at trekkinn offers the perfect foundation for any adventure. From lightweight long-sleeve tops for high-output trail running to warm, technical leggings for alpine expeditions, each piece provides unparalleled comfort, freedom of movement, and a tangible performance advantage. Elevate your gear from passive apparel to active equipment. Experience the science of performance and discover the X-BIONIC collection to build your ultimate outdoor layering system

X-BIONIC Base layers

X-BIONIC Invent 4.0 long sleeve base layer

X-BIONIC Invent boxers

X-BIONIC Energy Accumulator 4.0 long sleeve base layer

X-BIONIC Radiactor 4.0 long sleeve base layer

X-BIONIC Radiactor 4.0 long sleeve base layer

X-BIONIC Energizer MK3 boxers

X-BIONIC Energy Accumulator 4.0 long sleeve base layer

X-BIONIC Invent Base layer shorts

X-BIONIC Radiactor 4.0 base layer pants

X-BIONIC Invent 4.0 leggings

X-BIONIC Energy Accumulator 4.0 long sleeve base layer

X-BIONIC Symbio Merino long sleeve base layer

X-BIONIC Invent 4.0 long sleeve base layer

X-BIONIC Invent FX long sleeve base layer

X-BIONIC Invent FX long sleeve base layer

X-BIONIC Energizer MK3 short sleeve base layer

X-BIONIC Invent 4.0 long sleeve base layer

X-BIONIC Radiactor 4.0 leggings

X-BIONIC Symbio Merino base layer pants

X-BIONIC Symbio Merino long sleeve base layer

X-BIONIC Invent sleeveless base layer

X-BIONIC Energy Accumulator Light 3/4 base layer pants

X-BIONIC Energy Accumulator 4.0 3/4 base layer pants

X-BIONIC Invent Base layer shorts

X-BIONIC Invent FX base layer pants

X-BIONIC Energy Accumulator Light long sleeve base layer

X-BIONIC Symbio Merino base layer pants

X-BIONIC Energy Accumulator 4.0 base layer pants

X-BIONIC Mightywool long sleeve base layer

X-BIONIC Invent short sleeve base layer

X-BIONIC Invent 4.0 base layer pants

X-BIONIC CoreFusion Run short sleeve base layer

X-BIONIC Energy Accumulator 4.0 long sleeve base layer

X-BIONIC Energy Accumulator Light 3/4 base layer pants

X-BIONIC Energizer 4.0 3/4 base layer pants

X-BIONIC Xceed Run short sleeve base layer

X-BIONIC The Trick G2 short sleeve base layer

X-BIONIC Energizer 4.0 3/4 base layer pants

X-BIONIC Invent 4.0 base layer pants

X-BIONIC Radiactor 4.0 3/4 base layer pants

X-BIONIC Energy Accumulator 4.0 base layer pants

X-BIONIC Invent FX base layer pants

X-BIONIC Energy Accumulator 4.0 long sleeve base layer

X-BIONIC CoreFusion Run short sleeve base layer

X-BIONIC Energy Accumulator 4.0 long sleeve base layer

X-BIONIC CoreFusion Run short sleeve base layer

X-BIONIC Effektor short sleeve base layer

X-BIONIC Xceed Run Tank sleeveless base layer

X-BIONIC Symbio Merino base layer pants

X-BIONIC Invent sleeveless base layer

X-BIONIC Mightywool long sleeve base layer

X-BIONIC Energy Accumulator Light long sleeve base layer

X-BIONIC Energy Accumulator 4.0 3/4 base layer pants

X-BIONIC Invent FX long sleeve base layer

X-BIONIC Energy Accumulator 4.0 base layer pants

X-BIONIC Symbio Merino long sleeve base layer

X-BIONIC Symbio Merino long sleeve base layer

X-BIONIC Heatloop long sleeve base layer

X-BIONIC Mightywool base layer pants

X-BIONIC Energy Accumulator Light 3/4 base layer pants

X-BIONIC Energy Accumulator Light long sleeve base layer

X-BIONIC Energy Accumulator 4.0 long sleeve base layer

X-BIONIC Symbio Merino base layer pants

X-BIONIC Symbio Merino long sleeve base layer

X-BIONIC Symbio Merino base layer pants

X-BIONIC CoreFusion Run sleeveless base layer

X-BIONIC Energy Accumulator Wild 3/4 base layer pants

X-BIONIC Energy Accumulator Wild base layer pants

X-BIONIC Energy Accumulator Wild long sleeve base layer

X-BIONIC Invent 4.0 3/4 leggings

X-BIONIC Energy Accumulator Light long sleeve base layer

X-BIONIC Energy Accumulator Light long sleeve base layer

X-BIONIC CoreFusion Run short sleeve base layer

X-BIONIC Energy Accumulator 4.0 base layer pants

X-BIONIC Invent FX base layer pants

X-BIONIC Mightywool base layer pants

X-BIONIC Invent 4.0 base layer pants

X-BIONIC Invent FX long sleeve base layer

X-BIONIC Mightywool 3/4 base layer pants