The Radius Quarter Zip is built for versatility—layer it under a men’s windbreaker or wear it solo during cool-weather training. Made with microfleece fabric and stretch materials, it’s a high-performance training top that balances insulation, mobility, and breathability.

• Microfleece main body for lightweight warmth
• 4-way stretch chest panel with secure zip pocket
• 1/4 front zip with reflective bungee pull
• Cuffed sleeves with elastic binding for comfort
• Reflective Trailberg branding at chest

Perfect for layering or standalone use, the Radius is a long sleeve running top made to support outdoor movement. Whether you're on the trail or warming up, it delivers gym jacket men function in a streamlined quarter zip fit.