SHARKSKIN's R-Series reduces fatigue and increases muscle efficiency. Close out items may be exchanged for alternate size or credit towards an alternate product. There are no refunds on close out items. R-Series is a fusion of compression materials with liquid titanium that increases circulation and adds far-infrared healing to improve your athletic performance in and out of the water. Neoprene form-fit sections across back and shoulders improve posture Shape-stretch design provides superior muscle support Mesh ventilation breathing panels where needed for cooling Built-in wicking for quick drying Anti-bacterial for hygiene and odor control Reflective logos for visibility and safety SPF50+ rating for total sun protection