The Lululemon Drysense Shirt in Men's Medium size is a blue long sleeve gym workout training top made of polyester, nylon, and elastane. It features a lightweight, stretchy, and breathable design, making it ideal for activities like gym training, cross-training, and running. This shirt is machine washable, easy to care for, and perfect for active men looking for comfortable and functional activewear. The high-quality materials and construction make this shirt a reliable choice for various workouts.