Simms MRFC Logo Womens Midstream Insulated Vest, 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 effort to stay warm. Simms women's Midstream Insulated Vest is specifically cut for a woman's body and features PrimaLoft® Gold for the highest warmth-to-weight ratio available with synthetic insulation. The thin profile and lightweight feel of this jacket keep you moving and casting freely, without feeling over-layered. It offers unmatched warmth for its volume and is finished with a smooth Pertex® face for wind resistance. XComplete with the MRFC logo on the chest.