BALEAF Women's Workout Tank Tops Sleeveless High Neck T Shirts are made from 86% polyester and 14% spandex soft fabric that wicks moisture quickly and dries fast to keep you cool and comfortable all day. In addition to athletic usage, tank tops have traditionally been used as undershirts, especially with suits and dress shirts. Tank tops are often worn alone under very casual settings, as lounge wear, and/or while completing yard work or other chores around the home.