Model Number:Looking for an optimal performance base-layer? Look no further. The Craft Active Extreme Crewneck SS will take your running to the next level.The lightweight, stretchy fabrication wicks moisture away to keep your skin feeling dry and comfortable, while flatlock seams prevent your skin from chafing. Mesh panels in key areas allow for optimal breathability and prevent you from feeling overheated. The long length provides a no-gap fit and added coverage to keep you protected as you run.