Lululemon Twist & Train Tank - no size tag - measures 8 - 16.25” pit to pit You've got options in this weightless tank with side slits. Customize it: tuck it in for inversions, tie it to keep in place, or wear it loose. Mesh fabric Mesh fabric is lightweight and breathable lightweight breathable Fabric is four-way stretch, sweat-wicking, and quick-dry four-way stretch sweat-wicking quick-dry