The open pile construction allows excess heat and moisture to escape while helping retain the warmth you need. Whether you're picking up the pace or slowing down, Evolve helps you stay in your comfort zone.
Active Evolve
Warmth reimagined for active living
PrimaLoft® Active Evolve takes a different approach to insulation. Instead of trapping heat and sealing you off from the elements, its open structure is designed to balance warmth, breathability, and freedom of movement. The result is versatile comfort that adapts to changing temperatures and activity levels. Whether you're hiking uphill, layering for a ski tour, commuting through the city, or recovering after a workout, Evolve helps you stay comfortable without constantly changing layers. Available in a range of weights and constructions, Active Evolve lets you choose the right balance of warmth and breathability for the way you move.
Comfort that adapts to your day
One insulation fabric. Endless ways to move.
Discover the technology behind Active Evolve. Designed to adapt to changing conditions and activity levels, it delivers lightweight comfort, breathability, and reliable performance so you can keep moving with confidence.
From everyday adventures to demanding pursuits, Active Evolve is made to move with you. See how versatile performance and adaptive comfort help you stay ready for every journey, every season, and every challenge.
From the lab
Laboratory testing demonstrates the breathability of PrimaLoft® Active Evolve. Three industry-standard tests measure how efficiently the material moves air and moisture to help maintain comfort during high-output activities.
- High Air permeabilityTest method: ASTM D737 - Air permeability measures how easily air passes through a textile. High air permeability allows continuous airflow, helping release excess heat while reducing the build-up of warm, humid air inside the garment.
- High Moisture Vapor Transmission Rate (MVTR)Test method: ASTM E96 Option B - Moisture Vapor Transmission Rate (MVTR) measures how effectively water vapor moves through a material. A high MVTR allows perspiration to escape, helping keep the microclimate drier during activity.
- Low Resistance to Evaporative Heat Transfer (RET)Test method: ISO 11092 - Resistance to Evaporative Heat Transfer (RET) measures how easily water vapor passes through a fabric. A low RET indicates high breathability, helping moisture escape efficiently for lasting comfort.
















