What Our Gearhead(R) Experts Are Saying:"I have been running in the Swift Long-Sleeve Top through the coldest mornings of the season and the cuff-glove construction is the feature I did not know I needed until I had it. It keeps my hands covered on the descent without the bulk of an extra layer, and the two-way half-zip lets me dial ventilation on the fly so I am not overheating on the climbs or freezing on the flats."The temperature drops and the trail empties out, which is exactly when the best running happens. The La Sportiva Swift Long-Sleeve Top is built for those cold-morning efforts when the air is sharp and the pace is high, a technical base layer that handles the full range of winter running conditions without asking you to carry anything extra. La Sportiva combined a recycled polyester and Tencel blend in the main body for a fabric that is breathable, quick-drying, and soft enough against the skin to stay comfortable through long aerobic efforts. The high protective collar cuts the wind where you feel it most, and the two-way half-zip gives precise ventilation control on the climbs and the flats without breaking stride. The integrated cuff-glove construction at the sleeve ends is the detail that earns this top its place in a winter running kit, keeping hands covered on the coldest descents without the need for a separate glove layer. Reflective details and Polygiene(R) anti-odor treatment round out a top built to perform every time the forecast says stay inside but your legs say otherwise.