Dubbed "the Waterfowler's puffy", the Primer Vest boasts an incredible warmth-to-weight ratio and packs down small enough to fit in your blind bag. Unlike traditional packable insulation, the Primer Vest is constructed from a lightweight stretch nylon body fabric for an unrestricted range of motion and the durability to withstand seasons of abuse in the field.The Primer Vest is insulated with 80gsm of PrimaLoft(R) Gold synthetic insulation and features a windproof membrane to keep hunters warm all season long. When the weather gets really wet and cold, this vest becomes the warmest, most comfortable midlayer in your bag as it is designed to integrate with all our waterproof outerwear jackets. Parker is 5'9" 175 wearing a size Medium.