This is my new favorite polyester blend. It stretches in more than one dimension and is highly breathable, suitable for both heat dissipation and preventing freezing during night runs. Soon I will have a dozen of these to replace other brands. Some of them are sold untagged but still have tags attached :( either in the neck or on the side towards the waist. Russell DryPower or Champion DoubleDry /white, XLT β¨ Champion Double Dry Elevation T-Shirt Only Joe's DryEquip and Russell DriPower are in large sizes available.