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 top’s 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, ExoWear’s 4-Way Stretch provides more elasticity and breathability than the 2-Way Stretch foundin similar products. Mix & match with the ExoWear Pant or Short for maximum versatility.