Let us handle the elements while you master the terrain. Whether you are in the water, on the snow or running through a trail, this base layer will keep you performing at peak levels for extended periods of time. The Foundation Long Sleeve is created with UV 50+ protection to keep you safe in the sun. Our CoolCue™ Fabric and PostureCue Technology are designed to work together to provide maximum comfort while you train your posture muscles to support you properly.