EVOLITE LITE THERMAL PROTECTION SHORT SLEEVE FL The response 1.5mm Flatlock vest uses Guls' titanium-2 lined neoprene designed to reflect the heat back in. the response vest is perfect for keeping the wind off your back. The main body uses long lasting, durable and flexible dura-flex neoprene that has been constructed with Fatlocked seams to ensure an increased lifespan. The response vest has been designed with a reversible climate control system: the black side for cold weather and the grey for hot weather. The response range meets all the requirements for the all-round watersports enthusiast FLATLOCK: seam construction Side1: RS-Flex 150% Textured super stretch Side2: I-Flex 150% two tone super stretch TITANIUM 2: lined neoprene Reversible- climate control system Short lock Cord fastening system Size Shown is UK Size