It's no secret that layering helps keep us warm, but it's easy to end up feeling a little overstuffed with bulky layers in our efforts to stay warm. Simm's men's Midstream Insulated Jacket features PrimaLoft® Gold Insulation for the highest warmth-to-weight ratio available with synthetic insulation. The thin profile and lightweight feel of this jacket keeps you moving and casting easily, without feeling over-layered. It offers unmatched warmth for its volume and is finished with a smooth Pertex® face for wind resistance. PrimaLoft® Gold Insulation provides the highest warmth-to-weight ratio in synthetic insulation. Lightweight & wind-resistant Pertex® fabric. High-loft insulation in body & sleeves with, 1 zippered chest pocket, 2 zippered hand-warming pockets and Internal elastic cuff & adjustable hem.