Activities such as ski mountaineering, alpine climbing are primarily about climate control. Intense physical activity is often followed by static periods of hypothermia. This is addressed by the Ortles Hybrid TWR thermoregulation jacket, which is designed to meet the specific insulation needs of different parts of the body during activities with a high octane number in cold conditions. Hybrid design meets hybrid insulation - TirolWool® Celliant® is a patented lightweight insulation material , which combines innovative polyester fibers enriched with thermoreactive minerals and wool from Tyrolean sheep. The jacket is waterproof, breathable and thanks to the wool will keep you warm. Adapted, rear-adjustable insulated hood provides extra protection. And thanks to its small size, this jacket easily fits into any package and fits under any top jacket.