What is PrimaLoft®?

From active sheet insulation that adapts to your output to loose-fill insulation that mimics the loft and structure of down, we incorporate a variety of PrimaLoft® synthetic insulations in our gear.

Each type comes with its own unique advantages, designed for specific conditions and activities. So how do we decide which one goes into each product? Learn how these PrimaLoft® insulations work to deliver lasting warmth and comfort across a wide range of mountain environments.

Active Insulation

PrimaLoft® Active Evolve 

PrimaLoft® Active Evolve fibers vary in thickness and length, creating highs and lows within the insulation loft. This structure traps warm air while allowing moisture to escape, making it perfect for activities with changing pace and intensity.

PrimaLoft® Gold Active+ 

A highly efficient synthetic insulation that delivers the right balance of warmth, breathability, and stretch to keep you moving freely. Designed for stop-and-go activities, it works with air-permeable fabrics to keep you warm when you pause and ventilated when you’re back on the move.

Static Sheet Insulation

PrimaLoft® Gold Insulation with Cross Core™ 

PrimaLoft® Gold fibers are infused with aerogel, known for its ultralight insulating properties. The result is a synthetic insulation that’s exceptionally warm, lightweight, and keeps you comfortable even in the harshest conditions—your perfect refuge on icy belay ledges.

PrimaLoft® Silver Insulation 

This 100% recycled insulation is reprocessed and spun into new synthetic fibers, providing full loft and warmth in a highly breathable, quick-drying package. It’s perfectly suited for insulated ski gear.

Loose Fill Insulation

PrimaLoft® Silver: RISE 

Made from 100% recycled materials, this high-loft, loose-fill synthetic insulation delivers impressive warmth while staying lightweight. Highly resilient, it handles damp and cold conditions with ease, making it perfect for all-purpose, all-mountain jackets.

PrimaLoft® ThermoPlume®+ 

Designed for synthetic jackets that maximize warmth-to-weight ratio, this soft, feather-like insulation mimics the feel and movement of down. Made from 100% recycled materials, it combines ThermoPlume® plumes with fiber balls to create a resilient loft that resists clumping—even in damp conditions.