The ASICS Emma Racerback Tank gives you all the functionality a runner could want to keep cool and comfy when you're staying fit. Its full coverage mesh fabric offers a soft comfortable hand, wicking and breathability. The four-way stretch provides enhanced comfort and a wider range of movement. The scoop neckline and sleeveless, racerback styling offer complete range of motion to give you the most comfortable run possible. Flatlock seams reduce chafing and further increase comfort while the reflective details make you visible in low-light conditions for safer night running. 90% polyester/10% spandex.