Ski tours, fall mornings at camp, chilly days bouldering – the warmest Kyanite’s thermal performance, durability, and soft comfort let it shine as a midlayer or standalone. Polartec Power Stretch Pro has a nylon face for abrasion resistance, and its four-way stretch combines with articulated patterning for exceptional freedom of movement. The streamlined fit layers easily under a shell, and the low-profile ScubaHood adds warmth.