Polartec® Alpha™ is an innovative active insulation designed to adapt to changing conditions by effectively regulating heat and moisture. Originally developed for the US Special Forces to effortlessly handle the stop-go conditions of active combat, Polartec® Alpha™ is available in different lightweight compositions and can be worn as a direct, next-to-skin fabric. By keeping you warm when needed and releasing excess heat during high-exertion activities, it is ideal for outdoor activities.

Next-generation Polartec® Alpha™ introduces improved durability and more design options through new constructions, weights and textures, including styles blended with up to 40% merino wool. It retains the lightweight warmth, breathability, thermoregulation, fast drying and packability that define the original Alpha™ active insulation.

Active insulation refers to the dynamic ability of Polartec® Alpha™ to seamlessly insulate the body to regulate heat management during high aerobic output levels while keeping you warm when less active.

Polartec® Alpha™ uses a lofted fiber structure with a mesh core, allowing warm air retention when needed and enhanced airflow during movement. This active thermal-management system prevents overheating and keeps you comfortable in unpredictable environments.

Unlike traditional insulation, which traps heat indiscriminately, Polartec® Alpha™ offers dynamic breathability, fast dry times and moisture-resistance. By actively adjusting and automatically responding to your activity level, it keeps you comfortably warm without the risk of overheating.

One of Polartec Alpha™’s distinctive features is its open structure that allows exceptional air permeability so that excess heat and moisture easily escape during activity. Should it get wet, its quick drying times allow you to stay comfortable. The next generation retains these properties, supporting comfort as activity levels and conditions change.

Polartec® Alpha™ features an enhanced air-exchange system that is highly breathable. Furthermore, the continuous airflow efficiently manages heat and perspiration, preventing dampness and discomfort during intense activities.

Yes! Polartec® Alpha™ is lightweight and packable, making it very easy to pack without damaging its insulation properties. Offering exceptional warmth without the bulk, Polartec® Alpha™ is an excellent choice for on-the-go adventures or as that extra layer to put in your pack just in case it's needed.

Next-generation Polartec Alpha™ uses a patent-pending construction that improves the fabric’s structural integrity, increasing resistance to snagging and fiber shedding. It preserves the open structure responsible for Alpha(TM)’s breathability and thermoregulating performance.

New constructions, weights and textures give apparel designers more flexibility in appearance, feel and performance. The expanded range supports insulation within multilayer garments and, in suitable applications, standalone pieces that showcase Alpha™’s distinctive texture across outdoor, endurance, lifestyle, cycling, sportswear, and snowsports apparel.

For best results, wash Polartec® Alpha™ in cold water with mild detergent and avoid fabric softeners to maintain its insulating and breathable properties. And be sure to follow the garment’s care instructions.

To use Polartec Alpha™ in your designs or collections, contact our team through the <a href="#faq" class="open-contact-us-sidebar">contact form</a> to discuss fabric options and sourcing. For garments made with Alpha™ and design inspiration, explore our <a href="/products">Products</a> and <a href="/news?Category=Made%20To%20Partner">Made To Partner stories</a> on our website.