Men's PRO Alpha Layer

When the temperature drops, ditch the bulk and reach for the PRO Alpha Layer—your high-performance solution for warmth that breathes. Designed to wear under your favorite shell or as a solo layer, this top uses advanced insulation to keep you cozy through changing temps without trapping sweat. Constructed with 80 g Polartec® Alpha® Direct active insulation, it continuously releases excess body heat before saturation can build—giving you ideal temperature control on climbs, descents, and everything in between. Lightweight yet effective, it even earned the Polartec® Apex Award for innovation in technical layering. A YKK® semi-locking front zipper lets you dial in ventilation on the fly, and features like three bellowed rear pockets allow for secure storage—whether used solo or worn under a jacket. Pair with your go-to shell or team it with other core tops for layered versatility that adapts to every mile and weather shift.