Ready. Set. Explore. The men's Rossignol Sidelhorn Tee is a lightweight technical t-shirt for trail runs, hiking and mountain adventures. Built-in cooling technology adjusts to changing body temperature to help keep you cool and comfortable through varied efforts.

Regular Fit
Cut for a classic fit with a little extra room for comfort, allowing for freedom of movement and layering

Heat Regulation
HeiQ Smart Temp technology improves heat regulation by adjusting to changing body temperature. It helps you cool down when you heat up and slows heat loss as you cool.

Ultralight Feel
Ultralight materials offer distraction-free comfort and maximum range of motion

Recycled Materials
Made with recycled materials to help reduce the use of raw material resources