I'm sure there's some scientific reason for this, but if my core is warm, so is the rest of my body. That's why a vest is important, especially when fishing in cold weather with my lower body submerged. And who better to turn to than a company that specializes in fishing gear? The Orvis Pro Insulated Vest is a great layering option for anglers. Its insulation, comprised of multiple fabrics, provides stellar warmth; side panels help regulate heat and moisture while active; and a nylon shell protects against tears. The fact that it stuffs into the inside pocket is just a bonus. Available online; $169.