"Men's Brooks® Notch Thermal Long Sleeve 3.0: The Brooks Notch Thermal Long Sleeve 3.0 is a men's thermal running top built for cold-weather miles when you need warmth without feeling weighed down. Made from a sustainably-sourced notch thermal fabric, it delivers a soft on-body feel with enough breathability to keep you comfortable whether you're grinding out a long run or heading out for an easy morning effort. The semi-fitted construction gives you room to layer underneath when temperatures really drop, or wear it on its own when the cold is manageable.The fabric is 95% recycled polyester and 5% spandex, which keeps the construction lightweight while allowing natural movement through each stride. An antimicrobial treatment works against odor-causing bacteria, so the shirt stays fresher across back-to-back runs. Reflective trim at the back sides improves your visibility in low-light conditions - a practical detail for early mornings or evening runs when daylight is short. The low-shed fleece construction keeps the fabric looking clean over time, and UPF 50+ sun protection adds coverage on brighter days.Why Our Fit Experts Love It""I grabbed this for a cold morning run and was surprised how light it felt for a thermal - it didn't feel like I was wearing a heavy layer at all. The fit gave me enough room to throw a vest over it when it got really cold, and I noticed the reflective trim when a car passed me in the dark. It's become my go-to when the temperature drops but I don't want to overdress."" - Michael, Road Runner Sports Fit Expert, Seattle WAWho It's Best ForThe Notch Thermal Long Sleeve 3.0 is a strong choice for male runners who train through fall and winter and want a lightweight thermal long sleeve that handles cold conditions without restricting movement. If you run in low-light conditions regularly, the reflective trim adds meaningful visibility. The semi-fitted cut works well for runners who like the option to layer, and the odor-resistant treatment makes it a practical pick for high-mileage weeks. VIP Family members can take the Notch Thermal Long Sleeve 3.0 for a 90-Day test drive with our Perfect Fit Guarantee."