ExoWear Long Sleeve Tops provide the maximum thermal protection available in a neutrally buoyant exposure-protection garment and are designed for multi-sport use. Perfect on its own or under a wetsuit, ExoWear Long Sleeve Tops provide great protection from the cold and sun. OMNIRED Infrared Technology in the tops fabric converts your outbound body heat into infrared energy and reflects it back to your body for thermal warmth. 3-Layer Fabric protects from the harshest elements with materials that are water repellant, windproof, breathable, quick-drying, wicking, and anti-microbial. And because freedom of movement is essential in the water, ExoWears 4-Way Stretch provides more elasticity and breathability than the 2-Way Stretch found in similar products. Mix & match with the ExoWear Pant or Short for maximum versatility.