What Our Gearhead(R) Experts Are Saying:"I wear the S/Lab BTI Infinite Jacket when I need something insanely tough without extra weight. The Dyneema-infused fabric is impressively durable for how light it feels, and the slim fit stays put on fast runs. It sheds rough weather easily and still breathes well when I'm pushing hard on long climbs."We count on the S/Lab BTI Infinite Jacket from Salomon when weather threatens to derail big training days. Its streamlined shape, featherlight feel, and no-nonsense storm protection keep us moving fast, even when the mountain throws unpredictable wind or cold our way. This is the layer we trust when the route goes long and the forecast turns sketchy. What sets this jacket apart is its advanced 3L Dyneema(R) and Diamond Tech construction-materials engineered for an elite strength-to-weight ratio. The bio-based Dyneema fibers boost tear resistance far beyond typical lightweight shells, while the technical face fabric and protective backer deliver the breathable shield we look for during demanding runs. Finished with a slim, performance-oriented fit, it stays quiet, comfortable, and secure mile after mile.