Compressport - 3D Thermo Ultralight Top - Baselayer

Featherlight and super-soft long-sleeved baselayer, with optimised thermoregulation and postural support for year-round, second-skin performance

Seamless, featherlight and engineered to perform across the seasons, the 3D Thermo Ultralight LS Top is our most advanced baselayer yet. Developed with input from our professional athletes, it combines second-skin comfort, targeted thermoregulation and enhanced durability to support you through demanding runs, mountain adventures and long hours in the saddle. Weighing just 83g, this high-performance layer blends polyamide microfibres with 3D honeycomb knit across the chest and upper arms to boost airflow and breathability. Heat and moisture are quickly evacuated while warmth is retained where you need it most, keeping your core temperature steady as intensity shifts. Mesh panels under the arms and down the spine further increase ventilation, while integrated postural support in the back provides a helping hand as fatigue sets in. The ergonomic cut adapts naturally to any body shape, with raglan sleeves and overlock seams ensuring total freedom of movement and zero irritation. A snug knit around the forearms delivers extra thermoregulation in cooler conditions, while the innovative collar is raised at the back for protection, lowered at the front for breathability and overlapped at the sides for chafe-free comfort. Incredibly soft and exceptionally efficient, the 3D Thermo Ultralight LS Top feels like a second skin yet stands up to the demands of year-round training. Layer it in winter, wear it solo on cool spring or autumn mornings: this is the baselayer you’ll keep reaching for, whatever the season, whatever the sport.

Key Benefits

• Featherlight and seamless construction (83g), with polyamide microfibres for a soft, second-skin feel and zero irritation
• 3D honeycomb knit zones, on the chest and arms combined with mesh panels under arms and spine for targeted thermoregulation
• Integrated postural support and ergonomic fit, with raglan sleeves for ultimate comfort and freedom of movement