Alpha 120 is a modestly heavy insulation characterized by its extreme breathability, an absolute essential when trying to create warmth without overheating. Designed by Polartec for US Special Forces to use in cold wet conditions, it is a knit insulation created by splicing a spacer mesh into two faces. The result is a particular combination of warmth and openness but most importantly it is a non-migrating insulation, which means it can be paired with far more open face and lining fabrics than most traditional insulations.

  • Fiber Content

    Polartec Alpha 120: 100% Polyester

  • Fabric Origin

    Knit in USA

  • Fabric Construction

    Split knit

  • Breathability

    Extremely High