Hammer Hi-Bird Insulated VestThe Hammer Hi Bird Insulated Vest is a versatile garment that every outdoorsman should have in their repertoire. With a healthy dose of 100g Primaloft insulation, the vest excels as an outer layer worn over a hoody for unparalleled thermal on demand versatility or reach for the Hammer Hi Bird Insulated Vest when you need a mid layer to keep your core cozy when conditions deteriorate and the hunting gets frantic. The 4 way flex stretch woven poly