Orca Heatseeker Adult Thermal Swim Vest - Black The latest generation Orca Heatseeker Vest is a thermal base layer designed to be worn under a wetsuit in cold water to increase your warmth in the water. It can provide an additional barrier against wind chill in any type of outdoor water sports. The Orca Heatseeker Vest will be a valuable addition to any water enthusiasts’ gear bag.  If you swim in colder waters than usual, or are looking for extra wind chill protection while practising all kinds of outdoor water sports, then this Heatseeker Vest is just what you’re looking for. Don’t let the cold stop you!   Features 100% 2mm Open Cell Neoprene. The increased warmth and wind chill protection of this vest allow you to enjoy a range of water activities for longer. Classic Orca design.   UNISEX SIZE CHART SIZECHESTWAISTHIPS INCH. CM. INCH. CM. INCH. CM. XS 30 - 33.5 76 - 85 28 - 30 71 - 76 30 - 33.5 76 - 85 S 33.5 - 37 85 - 94 30 - 32 76 - 81 33.5 - 37 85 - 94 M 37 - 40.5 94 - 103 32 - 34 81 - 86 37 - 40.5 94 - 103 L 40.5 - 44 103 - 112 34 - 36 86 - 91.5 40.5 - 44 103 - 112 XL 44 - 47.5 112 - 120.5 36 - 38 91.5 - 96.5 44 - 47.5 112 - 120.5 XXL 47.5 - 51 120.5 - 129.5 38 - 40 96.5 - 101.5 47.5 - 51 120.5 - 129.5