What Our Gearhead(R) Experts Are Saying:"I've been using the CONCURVE WINDSTOPPER Insulated Jacket on cold morning runs, and it nails that balance between warmth and breathability. It cuts wind completely but still dumps heat fast enough to keep me dry during tempo work."We count on the CONCURVE WINDSTOPPER Insulated Jacket when we're pushing pace through frosty air and unpredictable weather. Built with a GORE-TEX WINDSTOPPER(R) liner, this jacket offers total windproof protection while remaining impressively breathable-ideal for runners who generate heat fast. Inside, PrimaLoft(R) Active Evolve insulation traps warmth where we need it most without adding bulk, making this an agile option for cold-weather training. We love the details too-elastic cuffs, an adjustable hem, and reflective accents that help us stay seen on early starts and twilight finishes. Whether we're interval training or logging long base miles, this jacket adapts to our tempo.