The Chillproof Essential Vest is a simplified version of the very popular Sharkskin Chillproof Vest with a simplified pattern and overlocked external trims to create a lightweight, cost effective vest with all the benefits of our proprietary Chillproof fabric. Designed for water sports enthusiasts who demand maximum maneuverability without sacrificing comfort and warmth. Large arm sockets and a low-cut neckline protect the body's core while allowing maximum mobility for strenuous exercise. Worn by itself or underneath a wetsuit or drysuit for extra thermal protection.