The Adidas Women's Alphaskin Sport Long Sleeve Tee is a popular base layer top for women runners on Amazon. It is made with Adidas' Alphaskin fabric, which provides a supportive and compression-like fit. The long sleeves offer extra coverage and protection against the elements. The moisture-wicking technology keeps you dry and comfortable during your runs. The flatlock seams reduce chafing and irritation. Whether you're running outdoors or hitting the gym, this base layer top offers both style and performance.